Just wanna make a quick comment about this.
My friends and I just got into naxx last night using only i200 and below gear, and we had only 9 players (missing one dps). We started on Anub'rekhan, whose damage was scaled to the point where our tanks would be one-shot with cleave+autoattack, however, with prot paladin cheat death we were able to survive and clear it.
Grand widow was next, she did one-shot our tank with an autoattack during frenzy, but when we had perfect timing with widow's embrace it was no problem, and we cleared.
We got Maexxna to around 10% before server restarted, so we ended up calling the raid. Maexxna's enrage is definitely overtuned for i200 and below, but our cooldown rotation wasn't perfect, and I expect we'll kill it tonight.
So far, it does seem that boss damage is a little too high for the ilvl that content was designed for originally, but with proper coordination it still seems possible. Also, as far as boss HP scaling, it doesn't seem to be a problem with buffed talents + non-****ty dps players. In fact, I think boss HP scaling may be too low, as we were dominating with only 9 players, but we'll see about other encounters going forward. Will post here with our findings as we continue progression.
edit: second night, 10 players (friend on mage literally wearing greens and greys) downed Maexxna, and all of Military Wing. Seems that Naxx10 has been fixed, or people just need to coordinate and play their classes better. Loving it so far.