http://www.theguardian.com/football/2014/nov/20/stoke-city-bojan-krkic-barcelona
Article/interview puts some things into perspective, here's one excerpt:
While there is no escaping the fact that the last three seasons, spent with Roma, Milan and Ajax, were a big disappointment, Krkic’s record at Barcelona needs to be put into some sort of context. He scored 41 goals in 163 games for the club, before the age of 21 and at a time when he was competing for a place up front alongside Ronaldinho, Messi, Henry, Samuel Eto’o, Zlatan Ibrahimovic and Villa.
1 goal every 174 minutes played while under 21- not shabby. Still has lots of talent.