As a shammyboxer this is disappointing to everyone of course, but I gotta say as a raider this is a great thing. I'm assuming the same thing will be true for moonkin aura (raid-wide, non stack). There really isnt room for more than 1 elemental shammy, and 1 moonkin druid in a 25-man raid. And those raid slots are gonna get more valuable with a new class as well. Moonkin druids especially have been difficult to justify in Sunwell raids, since they only boost their party marginally. They just don't have the dps to be more valuable than a shadowpriest for example. Shadowpriest has a similar dps (slightly lower) but they give so much more back to the party. Given the choice of 2 shadowpriests + 1 elemental shammy, or 1sp + 1mk + 1ele shammy, the moonkin has gotten the boot most often. Felmyst and Muru has to take some of the blame naturally, where Mass Dispel is the shit.

The raid-wide, non-stackable buffs are there to make sure that it's valuable to bring at least 1 of the MKs or Ele shammys, since their buffs are now 2-3 times as valuable. It's also a way to make raid composition interesting and to avoid too much single class stacking. Stacking warlocks hasn't been a bad idea in The Burning Crusade to put it bluntly.