Yeah seems lame. I got really really excited by the E3 trailer but having a bunch of plague/infested/fungus/zombie/mutant enemies = snoozefest. Man is always the most dangerous game. The best apocalypse stories are about human drama; the way the environment breaks and changes people. I thought it would be you and Ellen Page roaming around, maybe inflitrating camps, trying to build friendships with people, acrobatically sneaking into abandoned buildings, piecing together a safe home base and fortifying it with found items, and inevitably fighting humans but only rarely and it would be very complex ala The End in MGS3.
Ideally I would want a Bethesda-style speech ability where you could negotiate your ways out of most encounters by sacrificing certain things. Now that it's a "shoot the mutated glowing enemy and run from set piece to set piece" game I have lost a lot of interest.