As a KDE user, I don't have much knowledge about GNOME.
But I remember at the Chinese user support channel, many people have problems with the default input method (fcitx) and GNOME. The answer is usually to ask them to switch to GNOME on Xorg.
Someone may argue that ibus(another input method) is ready for Wayland, but fcitx is far better than ibus (for Simplified Chinese), except it's not ready for Wayland.
This user case may be not enough to change the default choice of GNOME, but I think this should at least be in release notes.
// send from my mobile device