It's kinda late and I haven't thought this through all that much, so take it with a lot of salt.
Oddly enough, I believe that the roleplaying section would actually benefit from paring down somewhat and even getting a little less organized. Right now, the roleplaying forums are structured in a way to help with a wide and vibrant community of roleplayers, something that is very much absent from the site right now. So, the roleplaying forums and sub-forums and sub-sub-forums can come across as intimidating enough that I can actually see it taking an awful lot of effort to simply say "Hi, I'm Pinkie Pie!"
The couple successful roleplaying communities I've been a part of were pretty much a free-for-all, with things like structure, canon or even historical consistency emerging from threads that grew to the point where some sort of fixed elements were needed, rather than being there by design and a lot of the time even those were optional in pursuit of plain, straightforward entertainment of people involved - and by extension, people who wanted to get involved.