Concerning Destruction: So the first changes come out, conflag will do less initial burst (a fair change, conflag was a little too powerful in PvP.) So I had faith that for the PvE aspect blizzard would make a change to later give some kind of buff to account of the nerf to conflag hits, but instead... it just makes it take... longer. Destro is already behind on the meters and nerfing it's damage just doesn't seem that right way to make it be able to really compete. (I really don't want to see a pure/hybrid argument... please.) I was expecting some kind of buff for PvE damage but it's like.. round 3 on patch notes and we've got nothing but a conflag Nerf.
Concerning Demonolgy: The buffs were awesome and very much needed. Right now I'm the guild meta lock and it kind of sucks just going in to have my pet auto-attack and I could almost just do whatever. These were some powerful changes.. decimate proc'ing off soulfire and a 5% spell power boost. That's good for the raid and you. But now it seems they have changed decimation by nerfing the haste it gives to your next soulfire..? I think even with the changes demo would have still have been lacking by a large amount.
For affliction: The change to Felhunter is a good thing, it provides a nice buff if somehow a priest or mage is missing and I've always viewed this pet as an affliction kind of pet. Also.. I am loving the new glyph for corruption. This seems like a really awesome way to get affliction back in the game for more than just beginning content, a good way to really make it scale.