Yes. By all means, IMO, ditch the PG, for the above reasons. Trying to make a shotgun more maneuverable for indoor use is kind of a waste. That's what handguns are for. I had a PG on my M500 for a couple of years, but now use a standard field stock.
The arguement against autoloading defense shotguns use to be: "They're not as reliable as pump guns!" That may have been true at one time, but I think a well-maintained auto is every bit as reliable as a pump, nowadays.
While an auto is more efficient once you get down to the shootin', it's getting there that's the problem.
I like to keep an empty chamber in my shotgun, partly for safety, and partly so I can use the intimidating shucking sound, if it's appropriate for the situation.
If you want to keep an empty chamber in an autoloader when you investigate suspicious noises (like the cat!), then you have to take one hand off the gun to chamber a round, which could be a problem if you're suddenly confronted with an intruder. And if you want to chamber the round right before you go poking about the house in the middle of the night, that makes a noise which you might want to avoid if you want to remain stealthy.
With the pump gun I can quietly leave the chamber empty, even when I'm investigating. If I do come across a threat and I have to shoot, it takes no time at all to rack the action, mount the gun (or not), and start shooting. And I never have to take either of my hands off the gun.
The efficiency issue: With not
too much practice, a pump gun can fired very rapidly, and with accuracy. The real advantage of the auto comes if one arm/hand is injured in the fight: you can still shoot the auto one handed. Much more difficult with the pump.
Under stress, the pump can be short-stroked, of course, but that's mostly a question of practice.
Then again, if I had the money, I'd buy a Benelli, too, anyway.
-boing