I dont think that he is ambitionless.He accepts to play with the best midfielders to prove himself.Every football player wants to do it.Sahin left because was not enough.Modric could have been a bad investment but his career grew with the move to Madrid.As Herrera said in a interview last year he signs for 5 years,not to be inmediately a starter.Silva and Illarramendi will leave and obviously Kroos-Modric can't play so often,which was a mistake last year.He is 21,and will have enough games.Croatians are usually quality players,hopefully he'll do well