I've been using GNOME on Wayland for over a year and have literally none of these issues other than X fractional scaling not being great. But even then fractional scaling is good enough that I generally don't notice it. (But all of my daily apps are Wayland native)
> swayidle is an idle daemon, where the maintainer doesn't think that it matters whether its connected to power or not
Sounds like a problem with the tool, not Wayland.
> color warmth setting
This is a general issue on Wayland but GNOME has this built in. I'm surprised that KDE doesn't.
> In chrome and electron it's supposedly supported but you have to toggle it yourself?
I guess Chromium's Wayland support isn't considered production ready? I don't use Chromium often but running on XWayland hasn't bothered me much. I guess this would be more annoying if it was your primary browser.
> swayidle is an idle daemon, where the maintainer doesn't think that it matters whether its connected to power or not
Sounds like a problem with the tool, not Wayland.
> color warmth setting
This is a general issue on Wayland but GNOME has this built in. I'm surprised that KDE doesn't.
> In chrome and electron it's supposedly supported but you have to toggle it yourself?
I guess Chromium's Wayland support isn't considered production ready? I don't use Chromium often but running on XWayland hasn't bothered me much. I guess this would be more annoying if it was your primary browser.