Yesterday Blizzard revealed that with patch 4.2, Tier 11 normal raid content will be nerfed into puggability.
(Yes, I just made up that word right now. But I think it's a fair description of what the difficulty of T11 content will look like after 4.2 hits.)
In any case, there's a lot of angst running around the blogosphere and forums. But the thing is that the raid paradigm has changed, and there's not a lot of use in holding on to the old paradigm. We've discussed this before, but raiding has switched from a "progression" paradigm to a "focus on the current tier" mentality.
This nerf fits right in with that idea. Come 4.2, the current tier will be Firelands, and all guilds will jump into that. T11 will become the province of pickup groups and individuals gearing up for Firelands.
And T11 does need a nerf in that case. Right now, it is not forgiving enough for most pickup groups to complete successfully.
It is also silly to expect that gear from T12 will make pugging T11 easier, as I've seen proposed. The people who will need to pug T11 are the people who need to gear up so they can join their groups in T12, not the other way around.
In my view, the "progression" paradigm is dead and gone. It's not worthwhile to protest changes from the point of view of "progression across tiers" raiding anymore. In the new world of raiding, only the current tier really matters.