Hummels, t.Silva, Kompany or whoever player you want wouldn't have done better than Pique this season!
Pique played most the games with 3 midgets along side him.
Alves, Masche and Alba/Adriano.
All the pressure especially on set-pieces was on PIQUE!
The difference between Pique/Alves 2008-2011 and Pique/Alves 2011-13 is that they used to play along-side PUYOL and ABIDAL!
With ABIDAL on the LB, Alves had more freedom to go forward. ABIDAl+PIQUE+PUYOl were able to stop opponents counters and set pieces.
Now, we have Adriano/Alba (attacking minded fullback) and a short DM playing as a center back (Masche).
Its simple, IMO we need to think about buying a defensive minded fullback to find the balance between attack and defence.
(A NEW ABIDAL), then buy a center-back.
Alves PIQUE CB + defensive minded LB.
OR
PIQUE CB ALBA + defensive minded RB.
Althought, I still think Alves Pique Bartra Abidal could work well for next season IF Abidal can play the way he did vs Levante!