I'm near the end and in hindsight I would have added just a few small things...
Like a stash refrigerator so we could add like a realtime the juices and drinks and food we found in the world..
An vault room where we can display items we found other than the guns.
A bigger closet space where we can display the coats and pants instead of that little cubby hole in the apartment
A better weapon wheel where knives is a seperate holstering option instead of a major gun slot since we can use throwing knives.
just an idea they could implement in DLC...