Well, after many many tries and wipes, today we went in and three-shot Maly as the weekly raid boss, and many of us popped [Champion of the Frozen Wastes] in the process. We're such noobs, half of us didn't know where the loot was. Bring in the flying gimmick, and we're not exactly at our best.
We followed this up with a not very successful attempt on Marrowgar-10; I think our Boomkin ditched us out of disgust. Or maybe I'm reading too much into the sudden without warning drop. /shrug - know what, I don't care. He can go do that, and as soon as a replacement is available for me, he can go do that without bothering me about it.
Marrowgar is a confusing fight; even with him scaled back to 10-man strength, the whirlwind is devestating. We need a lot more practice. Disc healing isn't exactly useful at that point, either.
The one good thing I saw was that my T9 2-piece bonus really makes the Frisbee stand tall.
The scary thing for me with regard to T9 and T10 is that Blizz is pushing Crit down so hard for the healing sets. Crit is a Big Deal™ for Disc healers. We get some from primary stats, which do get stacked, but the loss of Crit is going to hurt. The mace that dropped off of Maly was biased in the same way. This brings up some really interesting gear decisions.