Honestly, Zenith isn't that much stronger. I'd easily say it's the worst (but still very strong) performing team in the tournament.
Also, that still doesn't justify NaVi simply being worse than Alliance.
While I do believe NaVi still has a shot in this tournament, they surely don't do it in a fashion like the swedes did. Maybe the haven't pulled out their real strategies yet since it was the group phase that didn't decide anything. But I don't think that's the case since I surely don't believe they want to try out that many new things that they take such a beating.
Nevertheless, I still look forward to how they will perform.
Even though I wrote this all, I'm not an Alliance fanboy (I actually think that they play the most boring Dota in the current western scene) and neither a NaVi hater.
I'm just disappointed by the CIS-German mix since they're seriously playing under their maximum level
PS : Zenith still has a good shot though. They can beat most teams when they're in top form but they're not good enough to beat teams like LGD.cn/.int or DK in the same form in my eyes.
Also, from what I've seen in this tournament, Mushi has been more and more disappointing. BTS said it once, 2009 really dislikes Mushi for how he plays and I can only agree on that