Try it. I understand the concept but if the power supply is adequate it may not make a noticeable difference.
Another effect of the Bally wiring that's relevant on double flippers: On my Paragon, I can blip the right flipper button and make the bottom right flipper twitch (such as when passing the ball), while the upper right flipper remains still. It's not possible to lose the ball between the two right flippers when doing this.