It doesn't help when forwards who have looked great elsewhere (Ibra, Villa, Sanchez), take a significant step down once they play for Barca because they are not used to deferring so much to Messi.
I don't buy the argument that it is somehow our fault (the fault of our style of play) or Messi's that these forwards have not lived up to their potential, or perceived potential with Barca. I think a Neymar, a Falcao or even a Luis Suarez would massively deliver for FCB. I mean, it's not that our style of play destroys impedes them, if anything, it is them who impede our system. Furthrmore, all of the above, tended to become invisible for large parts of the games, plus missed lots of sitters, plus made countless cheap mistakes with their passing.