I think it is time for the world of Dayz to get a very basic facelift.
1. Out with the old, in with the new... :
The world of Dayz has always been one of cold war era cataclysm and decay. Decay is cool and all, but let's be real, the environment of Dayz has decayed to the point of turning white *insert poo emoji here*. Dayz could be brought to life (yes I get the irony) if its environment were to be shifted from one of years of decay, LONG POST INFECTION, to one of mere DAYS or WEEKS after, or even a combination of the two. I think Dayz could get a major environmental boost from transitioning to showing players the world of DAYZ in the midst of ground zero. Buildings and streets could look fresh (still strewn with chaos in the midst of the very recent collapse of society), vehicles shouldn't be rusted very much, supermarkets and stores can still be found stocked (somewhat significantly) with various food items and the like.
SURVIVAL IS HARD. But for the longest time, the world of DAYZ has felt beyond picked clean. And it is boring. It is time to freshen up zombie Armageddon.
2. Longer-term environmental goals:
One thing I would love to see some day, either done by the devs or modders, is a complete "fast-forwarding" and setting transplant, of Dayz, from the Cold War era to more modern times. Vehicles which look more modern, like how Arma 3 set its timeline in 2035 (Dayz could shoot for 2020, for example), along with fresher looking weapons, attachments, items, clothing, and buildings....would simply...be BEYOND incredible.
I think it would be cool if the dev team could really consider what it might actually mean to "breathe new life (or death)" into the world of Dayz Standalone.