For a lot of specific focus community servers, we run out of roles hella fast. It would be awesome for level 2 and 3 boosted servers, you get say 50 more role slots when you level up.
I run a disability focussed server and in order to accommodate as many people as possible we have a lot of condition and accessibility specific roles to make the server accessible for people with all different kinds of needs. This includes adding a variety of accessibility focused bots that take up a role slot each.
In order to be accessible, we have had to sacrifice a lot of the more fun server things like activity, vanity, event and earnable roles. As we grow I can only see this strain getting larger and I think it would be awesome to be able to unlock more role slots as a higher boosted server!