BTT process creates major input lag for certain apps

I think there should be a space in the settings dedicated to what the BTT process is allowed to listen for to decrease it's impact on input lag for certain apps. I don't use any mouse gesture modifications from macOS default, so there is no need to listen to the mouse or trackpad at all. I just want a few keyboard shortcuts. Please consider this. One app in particular is the game OpenRA. Running BTT introduces major input lag. Even with the priority tool.

BTT doesn't listen to events unless necessary, however especially games might not implement the macOS Accessibility API correctly which can cause similar issues. Try adding the game to BTT's sidebar and see whether disabling these things helps (window snapping and AX observation):