I just bought this machine and while I enjoy it as is, I'd love to see it taken to the next level. With that being said I've been thinking about things that, in my opinion, would make the game better.
I have a bunch of ideas but one is to use the right captive ball more.
The short version:
hit the right captive ball enough times to start 1 of 4 hurry-ups: Scoleri, Terror Dog, Gozer, and the Librarian. After completing/Collecting all 4, captive ball would start a 2 ball multiball with jackpots at hurryups, double jackpot at captive ball after collecting all regular jackpots, and repeat.
I've got more, but I may have overdone it playing pinball designer. haha.