For the next wow expansion they should have the players submit ideas and vote for the next class.
Like you would vote on which specs the trees would be, what style damage they do, tank with a shield or other.
Then submit ideas for spells the class would use, follow by a little lore created by blizz we could vote on, and then a name for it.
I think it would be pretty cool, plus blizz could adjust anything however they needed to allow balance, plus it keeps them from making a crappy new class we have to use for the next 4 years.