#1 Stability and consistency from last season
Two of the big six clubs in the EPL have new coaches coming in, so the players of Chelsea and Arsenal will need sometime to adapt to the new tactics, ideas and 'philosophies' of the new manager. New first team signings at Manchester United and Liverpool might also need sometime to gel with their new teammates and adjust to the club's surroundings.
At Manchester City, however, the situation is different. Majority of the first team players have been together with Pep for the last two seasons and have gotten used to his methods, training patterns and tactics. They have also bonded with their teammates, as two years of constant training and playing together means they are innately familiar with the playing styles and techniques of their colleagues.
Relatively few additions to their team means that the adjustment issues associated with new players won't be too much of a problem for Manchester City and could see them retain the league title they won so emphatically last season.