your all worrying too much. blizz is changing haste to make mana/rage/focus/energy regen faster, so at 0 haste we get focus back at 6 a sec. but with 400 haste ( thats how much i have ish) it would be alot more. this is gonna be sweet for pvp now we can just dps without worrying about mana. but pvp is boned cuz were not like rogues who can stun lock, we cant do 3 moves stun u for 6sec while out energy fills and keep dpsing, we cant burn anymore. its 2 shots ur OOF, but blizz has alot of mana regen skills in our trees. so id bet they will alter them all to accomidtae focus and make it easier to regen