WTF awesome? Are you serious?
MTT is a reason to bring 1 resto shaman in a 25m raid, but that's it. That's why you ignore resto shamans in 10m where they also suffer because of still missing effective tools to heal spreaded raids.
And all you say is ' shamans are fine in the first week', but even during progression, shamans are mediocre at best. And progress is still ongoing. In 10m, they simply allout suck because even on stacked fights, they are not better than other classes.
Look at heroic HOF while the first progression was and it still shows shamans to be at best compeitive on very few fights (those where raids are stacked) and only at the beginning. But on the other hand, mediocre on one fight, very bad on the other fight averages at a bad level. And discis are also during progression the clear winner over druids and shamans.
Here's the 3 months curve:
http://raidbots.com/dpsbot/Overall_D...00000000111111
You see where monks got nerfed, priests buffed and so on. But you also see shaman underperforming from day 1. Farming Content has made them only a little weaker. The difference was already big at the first week of heroic progression, as the graphs show up. The problem is here that our main heal, HR, doesn't work in 10m.
It will stay that way coming 5.2. In 25m, it's better than in 10m, but at best mediocre. 10m is simply painful. Resto would still need a massive overhaul to aoe spreaded healing for 10m raiding.
And finally: being the healer, who is only a supporter - well, it sucks over time. I'd strongly advise to any healer that if he has the choice between resto shaman and anohter healing class, get the hell out as long as you can.