Frances Bell

I confess that this is not my area of expertise but your ideas seem useful Tim.
I did wonder if there was much difference between we host Moodle® and Moodle Hosting®. Perhaps a better term might be Approved Moodle hosting® (qualified and adjectival ). This would allow non-partners to say we host Moodle® in your scheme.

Art is (almost completely) right (as usual ) but if you mean by from scratch that your students need to be added as users prior to enrolling them on a course, then they will have to create accounts or have accounts created on your Moodle site.

Sounds good to me too
Perhaps you would like to add it to Issue Tracker on Moodle front page.

I just don't understand roles yet I guess.

I am puzzled. It seems to me that ratings are available. What do you see Art?
We could always develop another scale or remove them, depending on consensus.