My initial assumption is that they won't.
Another thing I noticed, while not related to Enhancement, is how Elemental is going to have more viable aoe tools. In the mmo-champion note, it listed Earthquake as getting nerfed 40% damage. But what it fails to list is that they are changing it away from a channeled spell to a 2.5 cast time with a 10 second cooldown. It'll be nice for elemental to fire off an Earthquake and then working on a Flame Shock/Fire Nova/Chain Lightning sequence. Not bad. Hopefully we will get some other tools as well, since we don't really have a cleave/whirlwind mechanic outside of MW5CL.
Here's the snippet from the official patch notes, and surprisingly Seasoned Winds does stack. Makes it much much more interesting, but for some reason it doesn't effect holy damage? Probably keeping consistent with no other holy resistance on players. Maybe more of a balancing worry around Paladins, just not sure why they would be called out specifically. It's not like Shadow priests will have many options if we interrupt a Mind Flay.
Shaman (Forums / Cataclysm Talent Calculator / Skills/Talents)
Fire Nova has been redesigned and decoupled from shaman Fire totems. Instead, it now pulses that same area-of-effect from each target that is afflicted by the shaman's own Flame Shock debuff. It now damages all enemies except the target hit by Flame Shock. The ability's cooldown has been reduced from 4 seconds, down from 10.
Magma Totem now lasts for 60 seconds, up from 21.
Stoneclaw Totem's area-of-effect threat pulse no longer affects critters.
Earthquake is no longer a channeled spell. It now has a 2-second cast time, lasts for 10 seconds, and has a 10-second cooldown. Its damage has been reduced by 40% from its channeled version.
Improved Fire Nova has been redesigned and replaced by a talent called Seasoned Winds. When an enemy spell cast is successfully prevented with Wind Shear or Grounding Totem, the shaman gains magical resistance (in an amount equal to what a protection totem/aura would grant, stacking with such buffs) to the spell school(s) of the interrupted spell (except for Holy spells), lasting 10 seconds.
On the Fire Nova change, still not sure about it. It's unclear if it will consume the Flame shock, but if not we can cast 4 Fire Novas per Flame Shock cast. Which will be nice for fights with a boss and ancilarily adds. But in typical aoe trash situations like in BoT right now, the adds won't stay alive long enough to make this workable. We are basically using the old Shadow Priest Mind Sear mechanic, but we have a more costly restart mechanic since it will take and extra GCD just to restart Fire Nova aoe. Add in the shock cooldown, and it makes restarting Fire Nova even more painful.