Oh, you sweet summer child. GNOME devs don’t work that way. If the devs don’t want a specific thing, they won’t implement it. And not only won’t they implement it, they won’t even slightly go out of their way to make it easy for someone to make a plug-in to do that thing. GNOME still doesn’t have image thumbnails in the file picker, because that would entail writing an API to use something very slightly more demanding to handle the actual file picking instead of the barebones and impractical file picker GTK gives them. They have one vision for their DE, and if you don’t share it you need to educate yourself because their vision is better, they’re the devs after all. Just recently they’ve even gone out of their way to make it harder to make third party themes for GNOME, because why would you want that when the devs have made Adwaita for you?
KDE meanwhile may be slightly buggy, but it’s very customisable and the devs are very open to suggestions for how to make it easier to do interesting new things with scripts and plugins. If you like GNOME perfectly, great, use it! If you don’t like something about GNOME, chances are you’ll find it easier to fix by just switching to KDE and configuring it to be exactly like GNOME except for the one thing you wanted to change instead.