Heres a list of things I think you should add ( I will be adding more to this list later on),

Ladder hatches,
Paintable signs (Yes that would be very hard to add),
food,
A drivable heil (for admins so they can shoot down at people)(And I think you can change it to not Drop scrap metal why it blows up change it to guns and meds),
Bandages and large med kit,
Large and small furnace (For roleplayers)
And More clothes.
Bows/crossbows (I know there in the game but you could remodel them and make them craftable)
The Python (The gun not snake)
Attachments (Craftable tactical laser and holo sight, ect)



And thats all I can think of.
(Leave what you want in the comments)