If we are talking ideas, I would propose the following:
focus on the future instead of the past
get rid of everything Xorg (including xwayland). Reasoning: recent app upgrades to gtk4 and qt6 support Wayland just fine. Gnome has it by default, I’m not sure where plasma stands. Few things that don’t work, people can probably live without (like chromium which has Firefox as a working alternative)
replace OpenGL with Vulkan (that means get rid of OpenGL completely if possible). Reasoning: things sold in the last 10 years support vulkan.
not sure what is the state in smaller distros. Maybe it would be good to reach out to LinuxMint, lxqt and others to see what would it take for them to switch. If you could implement needed features easily…maybe they would switch.
I know dropping xwayland and opengl is unpopular, but this is where things are going. It’s on the gnome Todo sometime because as far as I read, there is development for mutter to be built totally without xorg support. Plus they recently switched gtk4 to use New vulkan rendered by default.
Another question came to my mind: how is video processing handled? There were some changes in Mutter and/or gtk4 so it would be efficient, any chance for louvre to have it?. E.g. www.phoronix.com/news/GNOME-46-Beta-Released