I can at least say that I have xserver-xorg-input-evdev installed and it works for me, so I’m cautiously optimistic it will work for you 🙂

I’m not sure where to give feedback to the libinput team on all this. I’m hearing tales of sorrow from many a gamer, so this isn’t just me, it would be nice to have the GUIs and default configurations updated in such a way that gaming feels good.