I'm not sure I agree with your logic. Zoo has a great matchup against Goblins and especially Merfolk, which is making a comeback. Not only that, but Stoneblade is on the decline and Batterskull has traditionally been the enemy of Zoo.
Goblins has to splash W for Thalia; Zoo can play Thalia already.
Combo is always going to be a problem, and that's where REB and possibly Revoker can come into play. Zoo has burn so it can win fast too.
David Price just finished 20th in the SCG Open with a pretty sweet Zoo brew:
http://sales.starcitygames.com//deck...p?DeckID=48481
As the man behind New Horizons, I can appreciate David's use of Horizon Canopy for the pseudo-card-draw effect.
Zoo isn't great at playing the control game vs. RUG Delver but the Jittes do the trick.
I also dig the 1-Wasteland configuration, for the random Waste-your-Maze blowouts.
The only thing I would try to do is squeeze in some Fireblasts, so that it becomes even more Sligh-ish in nature.