IMO, warehouses are pretty much useless and a waste of time and effort:
1. 3 door modules, yet not a single locking door in the place
2. window modules . . . no windows
3. 600 storage!?
Seriously!? The built in storage of a warehouse is 100 "stones" more than a wardrobe!?
One might say that: well, its a place to put chests, and crates . . . yes but so is a small house (which has a locking door). Just placing your chests and crates on the ground near your house is as secure as a warehouse at this point.
I have a small plaster house. In the wake of the most recent update, I went on a container building spree and built enough that I can sort things out by type and maybe never have any container too close to full.
I have 24 barrels (8 stacks of 4 barrels) in the front from of the house, and a wardrobe, there is room for a bit more; certainly plenty of room to move.
That is a total of 7700 stones storage space. That is one room in a small plaster house, and there is the equivalent of four times that much space in that type of house. I have little doubt that I could fit 32000 stones worth of stuff into containers in a small plaster house and still have plenty of room to move in and out, i.e., a real "warehouse."
The "Warehouse" provides nothing of any use at this point, much like many of the buildings.