A pistol grip alone sucks on any shotgun.
A pistol grip type stock, whether it be a Benelli style or adjustable AR style will reduce felt recoil in your shoulder because the hand grip will take some of it.
As far as the safety being a bit harder to get to with a pistol grip style stock....true, but hell I shoot and carry Glocks so the safety is between my ears and in keeping my finger out of the trigger guard until ready to shoot. I keep the safety on the shotgun when it's sitting or while walking or carrying it, but when I think I'll be shooting it, the safety comes off easy enough well before I even start aiming and goes back on when I'm done shooting. I'm not the type that keeps the safety on up until just before I pull the trigger.