I suppose I'm back. Hello again.
Magic, superpowers, etc. are always tough in RP's because everyone will have different visions and what these entail. Plus there's all the balancing issues, especially with superpowers.Agreed. Authors have the advantage of not having to work with another writer ... such as in RP's. It's when you have two or more writers and they don't work out all the rules that fantasy / magic becomes a problem.
LOL, I have tried mixing a "god" with a non magical world where the god is suddenly forced to do everything manually because magic ain't working. They have to get a job, etc ... Honestly, that's a tough idea to run with and a hard sell for most. Which admittedly means it is an idea to back away from and look elsewhere. Better as a story by an author than a collaborative fiction.