I think both of these games suffer from lack of "Flow" or whatever you want to call it. Lightning to me is fun, but a little cramped especially on the lower playfield. Neat design really but I find myself slapping the ball around as fast as possible so as to not lose it on the upper or lower PF, as opposed to making satisfying shots or setting up one. Good Rules though and still not a bad game. Artwork is super awesome.
Freefall has the opposite problem, not enough to shoot for on the bottom, everything is at the top and with no flipper up there, you're kind of at the mercy of the pop bumpers for almost everything. The artwork is stunning and the sound is great just like all the classic sterns. I love Harry Williams later designs, but I believe freefall is among the weakest gameplay wise. That said, it's still a good game, but just different. Gameplay wise, Galaxy, Split Second, Big Game, Flight 2000, Cheetah all have a bit better "Flow" than freefall.
Quicksilver is good, but feels A LOT like seawitch to me. that's not a bad thing. Seawitch is among my favorites.