I've been thinking about this idea for a long time now, and I have full support of it.
Smogon has lower tier ladders that give otherwise completely unviable Pokemon a chance to shine without any silly gimmicks or without being outclassed by something else. While this isn't competitive pokemon, it could benefit from this for the same reasons Pokemon does; this is a game about the characters, and we have a lot of them. The way I see it, the more viable ways to use different characters, the better.
...Of course, we don't even have an official tier list yet, do we?