Everyone I've talked to from ranks 2-16 say that 80% of the games are either Zoo or Hunter. I guess Column was right about Naxx just empowering the "faggoty" decks. This game is going to get trapped into a state of repetition if it doesn't do something quick. If you look at all the Naxx cards and do the maths, over 40% of the cards released are good for Zoo. FFS. I hope the last 3 wings do something miraculous to mitigate Zoo, but I know that realistically it's not going anywhere, for reasons we've already discussed. I know I was complaining the other day about playing against Control Paladins all day and having boring long games, and that holds true, I'd still prefer to play Zoo. But at the end of the day, the same thing over and over again will always be complained about by anyone.
You've essentially got 21 potential new cards for each class. Here are the cards either good, really good, or perfect for Zoo:
Haunted Creeper
Nerubian Egg
Zombie Chow
Echoing Slime
Deathlord
Undertaker
Shade of Naxxramas (will need testing, but it's still value and Zoo is about value)
Baron Rivendare
Loatheb (prevents board wipes on turn 5).
You might even consider:
Dancing Swords
Spectral Knight
Those last 2 are a reach, but the point is, they would still theoretically fit in the deck. If the meta changes slightly, Zoo might find itself needing something like Spectral Knight. But a solid 6 of 21 cards being perfect for Zoo is just ridiculous.
That's 8 of 21 right there that can't be argued... And the rest of the debatable cards for a total of 11 of 21.