If it would be a standard intented for Unix ideology and not business requirements of X11 (35+ years is a long time) or Wayland (RedHat is one company with its own interests, sometimes contradicting, say, mine as a Unix user), then it could work well.
X11 paradigm I like more than that of Wayland, but it could use some clearly incompatible changes.
How, exactly, is Wayland a mess? It has a good legacy window compatibility layer and is solving a lot of problems X11 had. Seems perfectly alright to me.
Ehhh, any time I try a new distro I realize after a half dozen apps dont work, that its because its using wayland by default. X11 just works, wayland is a mess.