> input is broken under Wayland
Drop the ‘Steam’, it's cleaner. Wayland's raison d'etre is to push frame buffers without tearing. Input is an afterthought.
> Input is an afterthought
This. You need more than graphics to have a windowing system. Wayland team threw out X11, did graphics and left the rest for the others to figure out.
That's odd, I'm using Wayland on my desktop and, for example, Japanese input works 問題ない. Then again, I haven't tried every possible input method/peripheral in existence, so I may just be the one in [some arbitrary large number] who lucked out.