So Blizzard has informed us that Firelands will start seeing nerfs shortly. Unlike T11 content, these nerfs are coming in advance of 4.3, and not after. Predictably there is a lot of anguish in the community.
I don't really know how I feel about these nerfs. First, I think an ICC-style stacking buff is the better way to go than actual nerfs. Even if you can't turn off the buff, I think people would respond to that better. 10% damage/healing/health a month is a good buff.
Objectively, 3 months from content release is a good time for the buff to start. A content patch usually lasts from 4 to 6 months, so having a buff come in at 10% for month 4, then rising to 30% by month 6 sounds about right to me. So I'm not really against the timing of these nerfs in the abstract.
On the other hand, my guild, and what seemed to be a lot of other guilds, had a pretty rough summer. Some canceled raids, some 23-man raids, some splitting into 2 10-mans, higher than normal turnover, etc. It feels like we've finally recovered from that and are just getting back into gear again when we're faced with the nerfs.
As well, I don't think Blizzard has the tuning of raids this expansion quite right. I think the end bosses on Normal are the correct difficulty, or maybe a touch too hard. But the beginning bosses on Normal are definitely too hard. For both T11 and T12 content, it felt like raiding difficulty started just below the wing bosses of ICC (Putricide/Blood Queen).
I think that's too difficult for the first few bosses of a tier. Bethilac, Shannox, and Ryholith should be easier, with the raid having a larger difference in difficulty from start to finish. Same with Magmaw, Omnotron Council, Halfus and Valiona in T11.
But other than those concerns, it's probably about the correct time for a nerf to content. We've had three months to establish our position, and now it's time for 2 to 3 months of cleaning up content.