The title will go to Man City or Liverpool, it is only 8 games into the season. Most seasons there are one or two teams who start well but collapse as we get into mid season onwards. I expect Leicester & Tottenham to fall away.
You make a good point about the teams that usually start the season well but later loose their potential and thirst for winning as the tournament proceed but I dont think Man City will hold this season title. However, there's chance that Tottenham wont be among clubs that will fall away during the mid of this season through the end cause they are planning to get a player that will somehow help the team