If you cant pull the trigger faster than the slide cycles, dont lighten it to make the slide faster. Now if it handles or feels heavy... makes transitions slow or draws slow because its heavy, that is a different story. If it nosedives on recoil, maybe lighten it. Reality I understand is most slides cycle in about .08 of a second. Even fastest trigger yankers have a speed limit of about .11 second. Normal human splits are hard pressed to be much faster than .16 or so. If youve ever heard or had a gun bump fire or go full auto, you will see its not likely you can outrun the slide. If you want to lighten the slide for looks or for feel or for handling, have at it. If you want to lighten it so it cycles faster, that is a waste especially when you describe the present function of the gun.