At the moment the microstutter in my Rift in both 1.5.7 and 2.1 is so bad, I won’t be flying the Harrier for some time (well, until it’s fixed, anyway). It’s impossible to read instruments unless my head is completely still, and trying to land a helicopter in ‘unusual’ places - i.e. not a plain, grey pan - is also impossible. ASW on or off, makes no difference.
Recorded a video - in 2D it looks like not much is wrong, have to watch it in 3D and see.