Let's not do any of this.
Divisions are completely idiotic and are just a sugarcoat for rating, the suggestion you've made is also absolutely asinine and basing things off a 1 win = 1 star 1 loss = -1 star in a team game is just stupid, suggesting for balance is like asking the impossible, 8v8's should be an entirely different bracket entirely, win-trading will never go away it's a thing with almost every PvP MMORPG and besides, all wintraders just get pointed out and blocked anyways.
While I agree on the base stats based off of your class(which is just stolen from WoW), you should still allow for progression in gear(just like WoW), just fairly miniscule. Your HP should not be decided based on what type of armor you wear, it should still be based on your class.
The rest is just pointless to even bring up.