i think it will largely depend on your personal situation, and what your using your shotgun for. I never had much of a problem handling shotguns out in the field duck hunting, and never considered much thought about the length of the gun, and obviously traditional stock is best for aiming.
For close quarters, home defense, etc. having a pistol grip for both the handle and the pump makes things much easier. Try handling your shotgun in the your hallway or car, simulate some SHTF scenarios, and you will quickly see how much more difficult it is to handle in confined spaces with all that extra length.
i have something similar to this
If your shotgun is for self defense, I would suggest the pistol grip, its going to make your gun much easier to handle, and much more practical for its purpose.
Run a few mock SHTF scenarios at your house, move about and handle your gun (unloaded), see if you feel the need to shorten it.