rural tiles, medicine and firearms
I haven't explored the whole map yet cause this game is appropriately hard, but rural tiles seem to not really be present.
There'd be "farm gun" type loot, like shotguns or .22s used for pest control and killing livestock, there'd probably be old trucks or something (when vehicles are more common) barns to hole up in, but most importantly, veterinary equipment.
It'd be cool if you could make a character with a rural background who understood veterinary medicine and how it could be applied to humans. I have a book or two which goes through all the major veterinary medicines and their appropriate dosages for humans (generally dosages are the only difference, and many drugs can be used in unexpected ways.)
I suppose medic skill could cover it.
In general i feel like it'd add a lot of depth if lots of medicines had randomised branding. medical skill could be used to identify obscure brands, just like if they were foraged food. Using them at the wrong time could give you status effects.
Going back to firearms, i really like that you picked the remington 760/7600 in 308 for the most common rifle. I can't begin to explain how glad i am that it isn't an m16 or something, which is what pretty much any other game would have done.
I'm looking forward to seeing more firearms for sure. 308 is a great survival cartridge but i really look forward to trying out .22s, .410s, 30-06, maybe even some of the cartridges you never see in games like 17HMR and 22-250.
I should also like to mention that i'm a game artist/designer myself with several years professional exp, and if you want any assistance with graphics i would be more than happy to contribute.