Michael Van Biesbrouck
I agree with Patrick on all points; possibly I should have made his points instead of or in addition to my analysis.
Do you think the game has a poor-get-poorer or a runaway-leader weakness?
And if so, any idea to mitigate that?
In the latter part of the game you spend more resources than you receive, so nobody gets richer. If poor choices or bad luck leave you with too few resources, then you are eliminated and can cheer the zombies full time. Once you are in a bad spot, either you'll get an amazing experience from lucking out on rolls or elimination will be swift.
The only flaw in the design is it might be a bit long for its depth. Experienced players will probably play rounds slightly faster but are more likely to get to the end of the game (playing more rounds).