A better co-op experience. Ideally a co-op mode where two people can run the same community, enlist new survivors, destroy plague hearts, etc. Together or alone if the other is currently offline. I’ve seen a few suggestions like this but I’d really emphasize a complete cooperative play through. One without tethering, and both players have freedom to do as they choose with the shared community. I think it’d make a great addition to the game or maybe even State of Decay 3.