The ball looks great, there are only minor areas that I think would need tweaking. When the rotating platform in the middle goes down the spacing goes from bigger to a lot smaller over one frame, from x60 to x61 it's still big, then from x61 to x62 it's small. I'd make that transition a bit more gradual.
When the ball gets off the platform on x80 to x81 I was a bit confused. At first I thought the platform is spinning/shooting him away, but then the rotation was going the wrong way. Framing through it I realized that it is the ball that jumps out. That part didn't read too well for me. Either have the platform shoot him out like that, but still reduce the spacing from x80 to x81, which seems almost poppy, or telegraph the idea of the ball jumping out more clearly by adding a bigger anticipation. It could squash a bit more and do a little swing to the left and then jump out.
The hangtime around the x112 area is a bit too much. The ball rolls up pretty quickly and then quickly slows down and hangs for a long time. Given how realistic the other parts are this is really standing out. You can exaggerate the hang time, but this is pretty close to Matrix bullet time. :)
The last bounces feel a bit soft. It looks like your squashing the ball on x149 while still having a gap between the ball and the platform. And the last bounce on x152 could be lower and a bit faster. Overall the ball could also move a bit screen right, since there is Left to Right momentum with that last big bounce with the long hangtime. It feels a bit off to see the ball have such a big arc and then during the last bounces it's just a straight up and down in Y.
That's all! Nice turnaround!