(Only replying to points that make sense to me)

>Consistent window decorations?

We have a protocol for this for compositors that want to support it: https://gitlab.freedesktop.org/wayland/wayland-protocols/tre...

>Redshift?

Works on GNOME, KDE and Sway.

>Global keybindings?

We prefer to let users configure those in their compositor's configuration file.