I really like this idea, and now at least have a name for what I hate about the original gamebar (Conduit). But I can't get this one to work. It took me some time to located it in the bottom right of my screen but clicking any of the buttons just brings up an empty white box in the middle of my screen. I'm not sure if this is possible, but future ideas you may want to add are customization of which D&D's are visible, since I know that many players (including me) find the lack of this one of the annoying aspects of the official toolbar.
Your toolbar is a great add-on but you should consider that your toolbar compites against a profesional game bar, but you´ve done great.