I would like to see the tent and barrel spawns increased to encourage base building and raiding. I've yet to see any on my travels that wasn't already propped up by a player.
Stashes fall under this umbrella as well I suppose. Drybags should be disabled as a stashable object. Why? Because they're far too common and can hold two M4s plus an entire row of ammo. Stashes that hold rifles should require effort to setup, such as moving a sea chest to wherever it is you want your stash to be.