I get that one of the hardest things for Marketo is to provide a million potential options and still make a clean streamlined user experience. I think they do a really good job. But if you actually implemented a bunch of the ideas from the community you'd have an over cluttered UI.
Suggestion: Super Admin panel. There are a number of 'nice to have' things that could be grouped together on a super admin panel.
I'd think all of these could manage to be on the super admin panel.