Thing have come so far in the past couple years that I'm not sure anything you mentioned is even a problem anymore. Global hotkeys work, pulse audio just works, screen sharing just works, redshifting is no issue?
No one cares that I can go and register global hotkeys in the compositor config file. The whole point is that apps do it themselves. If you still want a security theater, then add a prompt or what macos has where you go give it permissions.
If you see the global hotkeys section. It still has a lot of caveats. Bonus: see what's needed for push to talk to work...
The benchmark before wayland becomes default is:
Do OBS start recording shortcuts work.
And does discord push to talk work.
Today on KDE and GNOME the answer is no.
Any distro/DE that pushes wayland as a default without the answer to both of these questions being yes is pure cancer.
For anyone interested, there is a dbus API to register shortcuts that I believe KDE supports, gnome does only since the last 6 months, and hyprland/sway don't, and likely won't. Obviously, app developers aren't going to use it with such fragmented support.
https://wiki.hypr.land/Configuring/Binds/#global-keybinds
https://wiki.hypr.land/Hypr-Ecosystem/hyprsunset/
https://wiki.hypr.land/Useful-Utilities/Screen-Sharing/