I've played this game for a while - Kalou for Balotelli is much fairer than Mata for Balotelli.
Add in a decent chunk of money for Mata and you may have me interested.
If the players ratings reflect their real world form then you 'playing this game for a while' makes no odds; I think Balotelli is a better player than Mata in the real world, and it's real world form that counts. that said, I'm looking for a winger though, if you don't want the deal then at least talk sense when rejecting it.