Holy crap, AC.
The problem with RPing in SPPf as I see it is that new people will be constantly, almost undoubtedly turned down from games written by experienced players, because nobody wants an idiot running around what they have spent days or weeks formulating, typing out and trying to sell to the Serebii public. In their constant rejection from high-profile, well-written RPGs, these novices tend to lose their motivation for role-playing, which doesn't help the already small population of the forum. Eventually these novices join the only RPGs where they are accepted: flimsy, rushed games made by other novices which will almost certainly die or spiral out of control within the first few pages. Eventually the newbie learns and becomes more experienced (given that he/she continues to role-play), but the process takes time and many failed attempts as well as rejections, which is bound to turn many away from RPGs in general.
What we need is a place where these people can post without fear of being turned down instantly and work their RPG skills out in an environment that will encourage them to keep posting. In the past, mods have had various newbie-teaching 'schools' where they could RP and be told what they're doing wrong and right. It worked, but I think that in this instance we should have RPGs with simple (but well-thought-out) plots, preferably regarding major franchises that lots of people will want to join (Pokémon, Digimon, etc.), and classify them as Training RPGs or something to that effect. They should be short RPGs with simple adventure-boss-triumph story cycles where players will be able to grow and establish character relationships while doing what they like to do best in RPGs. Letting them learn this way is much more effective than turning them down eternally or letting them RP only with others of their same level. Those who are motivated will eventually become competent RPers either way, but one way is much faster.
Unlikely, but if you need someone to run something like this, I could do it once things in my RP settle a bit.
tl;dr bring back RPG school threads, but with actual adventurous plots.