Don't know if this helps but here goes.
About a year ago I purchased a Beretta Model 92 Custom Carry, loved the pistol but the trigger was nothing to write home about. The single action broke clean but was heavy with some creep. The double action though smooth was very heavy. To make a short story long the Beretta went to a very reputable local smith with whom I've been dealing for many years. He performed an action job on it and the difference was incredible. SA light (Guess 3-1/2 to 4 lbs) and crisp with no creep, DA firm and long, but not heavy. Have never had a FTF in over 1000 rounds, mostly my reloads and cheap practice ammo, since the action was tuned.
In answer to your question yes action jobs can be done to Beretta's without any lose of reliability. Just be sure to check out the smith and his reputation prior to proceeding.
Take Care