In terms of few zombies in the wilderness, I had an idea on the topic for a while but never brought it up 'cause I'm not usually active on the boards, but;
I *severely* dislike the way the game hamstrings itself in the long term with initial infection/first week/six months later scenario selection. I always thought the game should organically progress, with the game starting out with high densities of zomboids in the populated areas, and then have the density map equalize over time to model zombies migrating in all directions.
Basically, over time zombie density in populated areas should a go down a bit as they lose whatever memory/instinctive connection they had to populated areas, while at the same time increasing zombie density in previously unpopulated area to simulate them randomly wandering in all directions for however many months.