Hi,
this is probably question for mutter/gnome-shell maintainers. But as I see
it, there is a reason why are those patches not backported into stable
branches in upstream. There can be regressions, the thing that you have
zero issues doesn't mean anybody else won't have them. Backporting those
patches into stable releases for testing is not a great idea. There is COPR
(and Rawhide) for this.
I personally don't have any issues with GNOME performance on both of my
machines (AMD and Intel GPU), and would regret having development patches
backported when upstream decided not to backport them.Having a COPR repo
with those patches as an opt-in option is IMO the ideal solution for Fedora.
Maybe, the COPR repo deserves more publicity/article on fedoramag, post on
/r/Fedora and so on for people having performance issues.
But of course, you can make the PR against gnome-shell, mutter and discuss
the matter with maintainers, or wait for their reply here (you can try
sending this to fedora-desktop ML).