As long as there's enough players playing survival, they won't wipe it. Unless a good amount of players come to the forums and make a poll, but even then idk.. it's too much work and risk for devs to wipe the whole thing.
As much as I would love to play old warz again, I don't think it's gonna happen. Everyone got spoiled by having loot laying everywhere.
If they ever decide to wipe and do a proper survival version of the game, I would like to see 2 Colorado V1, 2 Colorado V2 and 2 California servers (perhaps adding more servers later on if survival succeeds). Balanced loot, currency, harder and extensive skill tree.
The things that made old game fun was, balaced pvp, exciting trading, farming was actually enjoyable. I don't think players care about new maps and so on, they want nostalgia cause that's what brings people back.