Changing aspects of a game inherently impacts balance as well. The start of the thread talks about entirely new abilities, so "balance" doesn't just mean shifting a few numbers around.
What can be said about the thread is only one person has properly responded to the prompt of "change 1 thing about each class". I started writing a list but then got frustrated trying to restrict it to 1 change per class, there are lots of changes I'd want to implement to balance things and create more distinct identities for the classes. Maybe I'll still do a giant post of all that, might want to do it in another thread though.
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