I'd like to have a way to "theme the admin area" independently for each member level.
Maybe use the page template custom styles, so we can design the page in the usual editor, then select which membership level(s) will see this as their back end.
It could be as simple as beginning with a plain white screen and then adding whatever content we wanted, such as buttons, videos, text, short_codes, etc.
Or we could even have a nice ajaxified UI with button effects, drag & drop content objects, etc.
Anyway the site would not look like wp, and control panel access could be strictly managed.