Atalanta have pretty much same squad the only player who left is Gossens. Other than that no other starting player have left and they have brough in some players (young as always). Did Milan buy anyone? Rome have very good attack and their defense is not bad. Mou will want to prove himself, if he doesnt fuck up his dressing room he will push for the title. As for Inter I cant say, their have quality players in all areas except their goalie who knows to get easy goals.
For Juve i cant say anything i saw some preseason games seems they dont have any ideas pushing forward and defense is much weaker with MDL and Chiellini, and fullbacks are serie C level.