Let me rephrase the above ... we've been thinking about providing simple group-role style admin pages because *we* think that's sufficient for the majority of sites (eventually we'll want to expose the extra capabilities of the system with other user-friendly admin UI but for now, if we can get the more common needs built with a user-friendly admin UI we can live with the ugly existing UI for the complex and rare cases.)
Anyway ... my point is that if folks think that a group-role style admin UI is wrong or seriously insufficient this would be a very good time to speak up and make suggestions.