With the new earthen power nerf for enhance its hard to say wether or not they will be viable after the patch. I agree with blizzard that cleansing totem does need a change but however i believe a nerf to shamans at this point when they are barely viable in arena at all is critical that other buffs must be replaced for the loss of these effects. I really think compared to other classes shamans are definately one of the under-dogs just in front of hunters (poor hunters lol).
I like the elemental buffs but i really don't see the point and those small changes are more of a nuisance change and will change your dps from about 50-100dps, (Not massive for wotlk).