I tried the preview and it appears to have completely removed controller support. I tried using a PS4 & Xbox1 controller and I couldn't get either to work at all. I then went back to the previous version of AIR and the controller support works absolutely fine. Edit: In the preview version I've just found that my Switch (wired) Pro controller works fine. My PS4 controller now works, but only the analog sticks (the d-pad doesn't work). My Xbox1 controller still doesn't work at all.