That makes sense, indeed if you look at it now and this season, City deserves to win the trophy because of its consistently good performance. Arsenal might still be able to catch up, but it might be difficult because there is City, where this team is a strong team, but I also think Arsenal have done their best with their game, it's just that luck is not on their side.
I can not come to a conclusion that Manchester City are more stable than Arsenal and Liverpool so far in this season. In earned points of three competitors, Arsenal and Liverpool both have one point more than Manchester City and it is quite wrong to say with a little bit easier rest last matches, Manchester City will take a first position from Arsenal and Liverpool.
It's only in theory and either Arsenal or Liverpool can beat Manchester City with 1 point more than the competitor. If Manchester City only race with one competitor either Arsenal or Liverpool, their chance to win Premier League will be bigger. It's not their situation now, they have two competitors and will need both competitors to lose points.