@davidrevoy where did the ICC files come from? Sounds like you did not generat them in a wayland session. I'd be happy to move my photo editing machine to wayland, but not being able to run displaycal or another calibration device that produces a profile at least the same quality as it does on X11 is a deal breaker.
Glad it is getting closer, but sounds like the whole thing isn't quite there. Having every compositor have do this themselves must be slowing things down :-\
@jussi