Benefiting from not having to play European games - likewise Liverpool.
City and Arsenal have the best two playing squads but behind Chelsea and Liverpool because of the demands of Champions League football. Arsenal had an easy group, but the only easy game City had was Celtic at home. Getting to be a theme this - miss out on champions League football and you have a big advantage in the Premiership
The Premier League has got much tougher in the last 2-3 seasons. Every team is difficult to beat. There are games where the big clubs win easily - if you score early etc, but you're playing with fire if you rest players, and if you're playing midweek, you absolutely have to rest players. I think this is why City, Arsenal and Utd have underperformed this season. A factor anyway