I could write an essay on what I feel is missing. Instead I'm just gonna say, perfect balance is not needed, and in most cases detrimental. This is just one point.

Hey don't want to expand stars cuz balance.

Don't want to introduce hybrid jobs cuz balance.

Imagine if a fighting game tried the same route and tried to get perfect balance. It's be boring as hell because a perfect fighting game has only 1 character.