I actually do expect their to be some problems. Much as love the sport, players are whiners. When someone isn't getting the playing time they expect, they rarely button-down and work harder in training to earn it. More likely, they complain to the media. They'll talk about going elsewhere to get regular matches, etc. The players agent is only going to agitate the situation, since another move earns them another fee.
One or two squad players getting unhappy and whining may have no effect. Or it can be a major distraction that can derail a season. It depends on the club, the whining player, and the leadership amongst the players. I fully expect a couple of Citeh players to be severely unhappy and vocal about it my mid-season.... Hello, Mario Balotelli! Glad you're still here, Carlos Tevez! Selling them becomes a real problem because their wages are unreal. Mancini is a good manager, but I have doubts he will cope if pressure is coming from all sides and the squad is coming apart...
It will also be interesting to see if Macini is able to keep the side playing an open, attacking style (which seems to suit the talent best) or reverts to a defensive approach like they did so often last season.
Citeh are amongst the favorites for the title this season and I wouldn't be surprised to see them win it. But just like Manchester United and Chelsea, I think they are a side with some flaws. I honestly have a bit more faith in the strength of United and/or the experience of Chelsea to carry one of them through in the end.
Planning on jumping off the bandwagon before then?