I also think Ghostbusters is one of Sterns best ever games - I've had it for 4 years and I just love playing it. However I'll be the first to admit that it has a few interesting design "features". It absolutely does require mods to cut down on airballs and to stop the ball jumping over lane guides. Also the right ramp on the premium is a super, super tight shot, not really very satisfying to hit and isn't used much in the gameplay (except for PKE you never really have to hit it). Flipper gap is fine don't mind it at all, and the magna slings are a brilliant feature. Yeah sometimes you get unlucky, just the same as with slings on every single pinball machine.
I have to agree with XMen too - another game I absolutely love, but the newton ball mod is such a vast improvement over the factory Wolverine.
As for Rick and Morty - you guys that hate it are crazy! That machine is amazingly well designed (hard as nails though).