1) Rooms within buildings is something I'm looking at. The idea I'm tossing about now is having a single building with multiple levels and rooms.
Cool
2) Infection was meant to be more deadly in Zafehouse, but it was never incorporated in the original game. I would like that to change in Z2.
Sounds good.
3) I'm not sure about survivors getting lost, especially if its very random. There should be more to raiding, I'm just not sure what it is yet.
I agree. If there is a way to adjust the odds in favor of veteran players and groups of players, I'd say go for it. If it'd have to be more or less random, I'd say skip it cause it would just be a pain.
As for the Zafehouse questions - zombie numbers are only generated when a survivor or survivors have an encounter. This number is always based on the Zombie Mass Index, which is incremented each turn and reduced each time you defeat a group of zombies.
Interesting.