I think it's a neat idea. Though it might seem a tad controlling to some players, others, like me, look at it like answering a casting call. I mean, in essence, we do audition for RPs with our own characters, so these seem like the reverse of that. Instead of us auditioning with our characters for the RP, we are auditioning our writing skillset for characters/roles already made for us. That, in itself, is highly interesting to me.

I considered doing it myself for one of the games I have GM'd in the past. Maybe I'll do it in a future one. :hmm