Roto's are too tight to shoot at and random to me. I prefer more fixed objectives. And on the 60's games the openings to the rotos are tighter where in the 70's they appeared to increase the opening a bit. Maybe that's adjustable and I don't know it. At the same time, I can live with a difficult to get to rollover lane.
I freely admit I haven't given too many roto games a whirl. You can see that from my collection as well as previously owned list. And I've spent very little time on Flipper Clown.
Overall I feel it's difficult to integrate a roto into a game well. As an example, I like Spin Out better than Buckaroo. With Spin Out the top lanes are open to get to whereas on Buckaroo it's mostly a bottom half game because you have to roll back up through the top lanes. Granted you can shoot back up to the pop bumpers on Buckaroo but you are obstructed to get through the top lanes. The roto is close on Buckaroo with smaller openings and longer on Spin Out with wider openings. That said Spin Out seems easier to succeed on both for the roto layout and the ABCD. But to me that makes it a more balanced level of game play. I'm not as patient in game play that rotos may require.
It's good that there are lots of games to choose from to get the variety that appeals to you. Good luck in your search.