He needs to be able to develop his game more, especially in general play. I think his passing and decision making to help us keep posession in the final third (critical to our game) is an area he needs to address. Messi can be played in the middle striking role for Pep because his decision making in general play is so good. If Bojan developed this area Pep could look to him more. Especially in Europe. Ibra can hold the ball up with his size, strength and dribbling, what Eto'o couldn't do he made up for with workrate. However Bojan continues to simply be a poacher...a good one at that...but he needs to improve his general play with the ball at his feet. Otherwise he needs to prove he can be a force playing wide and beating defenders off the dribble.
Still, off the bench he is great to have. However until he addresses those issues he won't get the #9 as long as Pep is coach. Working out in th gym and getting his body right is one thing, but in his spare time he needs to watch more tape.