It would be great if the options for building your compound were expanded. Right now it seems that once it's built, there's little to do but raid. Raiding is fun but balancing with ongoing build options would be even more fun. Maybe even an option where, at a certain level, you can expand your compound, double your construction options and recruit 10 additional survivors.
An option like this would break up some of the repetitiveness of logging on, running raids then logging off for the day. I sincerely hope that Con Artist Games sees the value in this as The Last Stand: Dead Zone is one of those games that I thoroughly enjoy and continually come back to but inevitably stop playing after a few weeks as the tasks just become rote.