What I'm getting at is what Wenger said to Brady. Every top player is problematic (As mentioned above). Vieira kicked for a transfer every summer, Henry scouled at the younger players, Bergy refused to fly. Campbell headed home at half time in a game. Messi seems like a nightmare he says who he wants an doesnt want to play with. From chatting to people in the game i knw scholes wouldnt eat after games. even though theres an opertunity after you train for your absorb nutrients like a sponge to recover/refuel much quicker he just wounldn't do it. If hes an average player you can make him, but if he's Scoles he's going to do what he wants he knows he can play for any team.
Raboit if he's amazying is probably going to have an Ego to match that so yes he'll be difficult. But if we have high ambitions I don't think we can rule out players that are divas/ problematic. You have to weight up how problematic they are and make the decision based on that. Emerys knows if this guy is worth it or not.