On my air 2, i was getting some slowdown but not too bad. After iOS 11, ir seems to be much worse. Every game is bad, though ameryl and mordrake seem to be the worst. I assume it’s some of the particle affects… doesnt have to be that many units on screen to slow down.
hm havent upgraded from 10.3.3 to 11.0.1 but ill keep an eye for this problems. what kind of problems you run into?