No bugs yet but I do have a few suggestions.
(1) Have NPCs do "work" in home base (HB). HB feels and look empty, it`d be nice to see other survivors (that you unlock) becomes NPC and do some work around HB. I dont mean a whole new system where you pick and choose who do what (that`d be cool too) but just let the NPCs animate as if they`re doing work i.e. tending crops or fixing something.
(2) A system where you pick one (or more) Survivor(s) to be a "Guardian". He/she will help you fight the Approaching Herd (while the other NPCs runs back inside HB.
(3) A Buddy system. You bring at least one NPC on your adventure (Solo only).
(4) Vehicle types. A sedan can carry 1-4 people but a bike can only carry 1.
Also, I just wanna say; its a very fun game. I cannot wait to see what your game will become in the future!