I owned a Pacman cabinet for a few years. Pacman gets boring. The original board stopped working, so I had someone repair it and add 4-in-1 multipac chips. (Pacman, Ms. Pacman, & speed hack versions of each)
Got bored with that after a while and sold it. I regret selling the cab, but only because of its aesthetic appeal. I wish I'd MAMEd it.
Ms. Pacman is great for guests if you have the space, but IMO the Pacman games alone aren't worth it if you only have room for a few cabs.
You've already got the CP set up for a wider variety of games, roll with it and keep the disconnected original parts in place inside the cab for preservation.