It would help if Gnome wasn't so hostile towards proper cross-DE interop. A famous quote by a Gnome dev goes, "I guess you have to decide if you are a GNOME app, an Ubuntu app, or an Xfce app unfortunately"

They seem to genuinely believe that their way is the right way and everyone else is "holding it wrong" so there's no need for things that would make cross-DE apps easier (or even possible).