I got today a index firmware update and a steamvr update.
We can now change the 80,90,120,144hz ingame! so you dont have to reboot anymore.
Also the brightness can go up to 140%
This is great,pimax please add this option to pitool so we dont have to reboot when we cange the refresh rates!
Just copy and paste from index 
Because that’s how it works, especially if you don’t enjoy the lowlevel access the guys from SteamVR/Valve have 
Pimax will do the bare minimum to get their headsets working. Don’t expect them to follow in Valve’s footsteps anytime soon.
I think they’re doing all they can with their limited resources.
@Alex.liu
You’d be surprised what they can pull off though.