Wayland reflects status quo. Truly desired missing features are reimplemented — screenshots, screensharing, networking. Try to make a change, maybe you'd find out this feature is not that useful.
I'd better think why .Xresources never catched up. For example, I've downloaded Gnome theme. It contains some CSS files, a lot of images and some rc files. Or check about:config, chrome://flags/ — no images there, but interface is so much nicer than a list in man pages and plain text editing.