Some of the cards from yesterday nobody posted, and Alanna which was mentioned but not posted:
Hunter: Requires you to have at least 4 secrets if you want the full effect x2, might be tough getting the upgrades unless you're an all out secret deck. Even 2x 3/3 wolves on 5 mana (unupgraded) is fairly "ok". It's 6/6 worth of stats, and beasts. Gives Hunter more board flood which they love. And if you can upgrade, it's excellent. Hunter 5-slot isn't too crowded and curves into Highmane->Bonemare nicely.
Priest: Seems like another great card for DK Priest. Also seems very good in Big Priest. Probably best in Big Priest... seems like it'll be incredibly strong/annoying in Big Priest.
Warlock: Deathrattles aren't the most prominent in Warlock. And the new 9 mana demon now needs to be "played', can't be cheated, if you want to upgrade this. Destroying minions is super-strong though, maybe a deathrattle warlock deck appears out of thin air. Destroy 1 minion for 5 mana is not terrible though, it's "Assassinate", which doesn't see play, but 6 mana Siphon does see play and I'd wager 1 less mana makes up for the 3 health gain. So could probably replace Siphon with this card even if you don't upgrade.
Seems like Quest Priest might return, but DK/Big Priest probably still stronger... or maybe Quest finds a way into DK. You can run less deathrattles because of this card. 2x Deathrattles and 2x this = 6 deathrattle triggers.
Already discussed... effect is pretty strong for a freeze deck but freeze lists don't often flood boards and this plays right into every AoE clear out there. Also could fuck you if Priest Psychic Screams