What went wrong for barca this season and how they can correct it?

"Final score 7-0 on aggregate ...stupidity...what else I have to say?".The words of ten action commentator still echoes in my ears.Yes...they had been defeated in the past like aganist inter milan in 2010 and aganist chelsea in 2011..In this year too,they had been beaten..aganist celtic on a 2-1,aganist milan 2-0 at San Siro..The season witnessed also a legendary comeback.To put it in Piques' words it was indeed a "magical camp nou night".Milan was demolished at Nou Camp by a 4-0 which took barca to quarters.
But barca were thrashed at the hands of Bayern.Barca did their passing game but was unable to create chances or to utilize the created chances.With such a shaky defence and a blunt edge attack without lionel messi,questions had been raised about the so-called" messidependencia".
But what went wrong for them?How they can correct it?Is barca still the best team in the world?These are some of the questions that had to be answered by the end of this article.
 Firstly a positive news for all the cules..I dont know how many cules had noticed it..The clubs' philosophy is still alive!Despite the humiliation,Bayern had not been able to destroy their passing game.What bayern did was simple.They relied on a counter attacking philosophy.But that wont work if barca had a strong defence.Let us take a look into three areas and identify the key improvements required.

DEFENCE
Like I said early,the  defence of barca is one of the worst in the world.This surely call for improvements.
Puyol is no longer the best.Dani alves contributes to attack than the defence.Jordi alba does his best.But he also is attack minded like the brazilian.Bartra and Montoya are good,but they lack experience.So it is better to loan out both.So we are left with Pique.Gerrard received a lot of criticism last season.But the fact is he is wearing out.He rarely gets rest and lack of support from his team mates which further aggrevate his situation.
WHAT TO DO
A lot of signings are required.I recommend 3 centre backs at a minima.The apt options are Hummels &Subotic the dortmund duo who helped borrusia to reach this years' UCL final.Especially hummels had been particularly suitable for clubs' philosophy.He made a lot of key interceptions aganist malaga,bayern etc..Hummels had already revealed his interest in barca.He even posted a pic in his twitter featuring featuring a blaugrana shirt in the background.Subotic can be described as the next john terry.His save aganist an arjen robben shot reminded me of Terrys' save aganist barca last season.

Other options available are David Luiz,Vincent kompany,Thomas vermaelean and thiago silva.David Luiz had already been speculated a move away from Stamford bridge.Thiago silva,although28, is a very strong defender as seen from Barca-PSG UCL.The brazilian is urgubly the best defender on the planet,but like his fellow country man david luiz,his fee is very high and can be upto 40 million euros as per the reports.Vincent Kompany,the out-of-favour manchester city captain who costs around 20 million euros is another option.Romas' Marquinhos and Inigo Martinez are other options but I havent seen the actions of both of them much.So stick to hummels,subotic,Luiz/silva(if funds are available) on priority order.

Another important thing is sign a good goal keeper.We all know Victor Valdes is not the best goal keeper in the world.His silly mistakes cost barca in past times,most recently aganist real madrid in spanish supercup.However he is not a bad one either.Bless him or curse him,the guy is making his way out of nou camp!If valdes is leavingthis summer,they need to find a replacement.My suggestion is borrusia monchengladbachs' marc andre ter-stagen.He is a stunning shotstopper.
MIDFIELD
Barca midfield is still the best.There is hardly any need of improvements.
Thiago alcantara,half italian half brazilian,who is labelled as the next Xavi must step up or he should be given more chances.Midfielders' obivious frustration is justified when he is performing at his best with around 92% pass accuracy,next only to Xavi himself.
Retain cesc and song.Yes i could practically hear all those bad words aganist me.But they should be given a chance,atleast a season,before deciding whether we decide to sell them.But speaking economics,it would be difficult.Neymar is a done deal.Barcas' defensive frailities are on a alarm bell.So money need to be pumped.Manchester united had already hinted a move to land fabregas for an approximate fee of 30 million euroes.Next thing barca must do is to sell Jonathan Dos Santos,Bojan kirkic and loan out Sergi Roberto.The former too are not even worth a chance,while latter is surely the next"iniesta".But roberto needs more chances so it is better to loan out him.
ATTACK/OFFENSE
7-0 Scoreline shows too things.A weak defence.Next a weak offence.Admit it cules,we had been a bit over reliant on lionel messi.FC Barcelona needs a strong attack to succeed in big stage like in UCL competition.
WHAT TO DO
SELL PEDRO,SANCHEZ,VILLA,IBRAHIM AFFELAY.
Yes david villa was not a disaster in fc barcelona.He did scored goals.El Guaje,the predator,had performed well in his first season.He formed a decent company with messi and was a constant threat for opposing goalkeepers.But a fatal injury to knee has weared out villas' form and he is no where near his old self.Also villa is no longer a starting eleven  favourite in titos' team.So in the best interest of both team and player who clearly looks out for the next years'Brazilian world cup,David Villa  must leave.
Pedro Rodriguez is not even worth a penny.Despite all the chances Pep Guardiola,Tito Vilanova and Jordi Roura given him,all he did was passing to his team mates like his chilean teammate Alexis Sanchez.Both these guys are forgetting about their attacking  responsibilites and do the passing.Infact it is because of these irresponsible wingers that the question had been raised.Paris Saint Germain had  already hinted a 40 million euro deal to land pedro.If it is true,Sell him.Alexis Sanchez is already on his way out,with Juventus,Intermilan and Manchester City the interested parties.Ibrahim Affelay the dutch winger must be sold out,who is currently on a loan to Schalke04.
My suggestion was to forget about neymar and buy gareth bale.But reports from Brazil and Spain suggests that Neymar penned a five year contract with Barca for around 60 million euroes.But barca needs a more'physical and strong' player who can cut through the defence easily and score goals through set pieces(which opposing teams often does aganist barca!).Gareth Bale can easily do that.Moreover he is not as expensive as Neymar.
But barca need another winger too.This option depend also on the clubs'financial status.They need to sign a winger other than neymar/bale,most preferably Sergio Aguero of city,Robert Lewandowski of BVB.Agueros' late minute goals are famous.He is a constant headache to defenders.Moreover he can form a good partnership with his fellow argentine Lionel Messi.He also played in spain before

.
The polish striker Robert Lewandowskis' ability to score from penalty areas is famous.In most of the matches barca lost recently,they had been able to reach ball into the penalty area but unable to score.The problem with Robert is that there are rumours suggesting that he had already signed for Bayern.Radamel Falcao,Javier Hernandez,and an ageing Wayne Rooney are other options.

So we cant say that barca era is all ended.Like Iniesta himself said "to talk about an end of era is rubbish".But FC BARCELONA SURELY NEED SOME CHANGES.If tito vilanova contunue to make some,it will do.But if he didnt and continue his old strategy of rubbing his chin and acting as blind(it took 80 minutes to make his first substitution aganist bayern,that too only after 4 goals scored!),he should be sacked.If they can correct it like I said, they will continue to be on the top of the world. Visca Barca!