Your idea is interesting so I tried to think of things that employed it in the past. Basically, you're arguing for stronger creation tools for a narrow domain.

Your idea is interesting so I tried to think of things that employed it in the past. Basically, you're arguing for stronger creation tools for a narrow domain. The spore creature creator seems to be an example. It was awesome for the variety and I wish that portion of the game could have been taken up more my the industry as a content creation tool for devs. At the same time, models in spore look pretty same-y - as is the problem with all procedural content. Still, same-iness is not always a bad thing.