Well its not like the beta is over btw.
In our current form I think three things would be the best buffs for us ver all. (hey I might be wrong =P)
Arcane mages once and for all becomming awesome dps, which is very used. (they would be BEGGING for our debuff then)
Cooldown on haste reduced to 12-15seconds. (would make it a bit more fun too)
Shamans totems nerfed slightly, and most of all revert Wrath of air to give spelldamage again.
Ofc there are more thing to do till we're great, but personally I think the above, would be the main factors left, which could ruin it for us, and make us "underdogs" again.