A quick consideration on all the nerfs.
Enfeeble: I would have preferred to see this moved to 4 mana and Metamorphosis lowered to 5 mana. At 5 mana it will still see play, but it won't be as abusive as before. Okay-ish nerf
Shadow Sister Kelaino: overnerfed, at 3 health it dies to basically everything. I would have preferred to see her changed to 2/4.
Thumping Wave: I didn't have particular problems with the card, but I can understand the nerf. It will still see play, okay nerf, though the real problem here was actually Elucidator
Flash Reincarnation: nothing to say, it should have been like this since the beginning
Chrysalis Burst: no reason for this nerf and a card killed. I will enjoy the 2700 spirit...
Windblade Adept: perfect nerf, though unexpected
Grandmaster Nosh-Rak: superficially it does not make much sense, but I see why it could be problematic in the future. Let's wait, no judgement on this
Meltdown: I hate this card, but rising its cost would probably have been enough. None is playing it for the stats, but I think the nerf was due