Honestly, I personally feel sorry (with every intention to offend) that you and others like you settle for and defend tooth and nail a half-baked solution, glued together with saliva and that breaks every time a core GNOME developer decides on it like monkey-patching over a shitty API. Not to mention the fact that KDE also allows it, and I say this as a KDE user, for the deepest part of its extensibility and scriptability, but without breaking it just because it looked ugly, and also allows other types of extensions, such as compiled dynamic libraries, or Plasmoids and components.