Levy doesn't appoint managers to win things. He appoints them to have us in there competing. It's the if you don't shoot you don't score principle.
If you actually mean what you wrote there then you set the bar higher then the club does and are just waiting for him to fail.
Levy got a decision to make. Hire:
Coach A: Win things
Coach B: Competes
So Levy then goes for Coach B because he values that more than winning?
As for my expectations I think 85 points is within reach assuming N'Dombele can last for longer than 12 minutes a game and we are generally OK in terms of injuries. At around 85 points anything could happen.
I can't see us running away with things Liverpool and City have done earlier (even if Leicester also kind of did that), but Liverpool will obviously regress some and City are not exactly a young team. If Sane leaves and the likes of Silva, Aguero etc. start to feel their age then they could very well end up around 80 points again. Not impossible for us to reach that level next season. Far from it.
On the "down side" anything worse than this year would be very disappointing.