The paintball arena shit will be fine, it's not much more than fencing or walls to block people off. All of schitty and major structures save for the center tower were torn down and or burnt/disposed of already. If they intend to reuse these areas as part of the set it'll need to be rebuilt save for the arena anyhow. Tbh what they should do is utilize both the house and either have some events outside or some other dumb shit if they do another LARP season. Like the house is a safe zone and the forest they loot or some dumb shit when they go out at day and come back in at night. Most the best footage of 2.5 was from director cam anyhow and not much else, some cams were pretty useless. Theres a lot of options here tbh.
I know Jet said he didn't want to have to redo everything outside again before too, but who the fuck knows. By the sound of it though we aren't getting a 3.5 because they want to have season 4 to be able to combine 3 and 4s cast of allstars to make 4.5.