Apropos role-playing games: superhero universes are a great example of how you don't want to end up in your storytelling. Mashing everything together (I believe the term is "jamming") just so everyone can have what they want, with no regard to consistency. Here's a Norse god with a mallet, here's a guy who got bitten by a radioactive spider.
Official RPG campaign did it a lot, because of course they wanted to sell the X supplements to the Y players too.
Yes, indeed. I understand that some editions of D&D are considered class-unbalanced because high level mages are so powerful.
When one member of the party can stop time, call down meteors or kill with a word then just being able to swing a sword really well seems less impressive.
Official RPG campaign did it a lot, because of course they wanted to sell the X supplements to the Y players too.