I have a collection of about 30 or so cue balls. Different weights, different styles, different surface textures and even different sizes. I HAD one of the measles balls for awhile, but it hit so close to the standard ball that came with my Aramith set that I gave it to a friend.
I never got any more feedback from it than I did from a normal (white) cue ball. I pretty much know how the cue ball is spinning when it leaves the object ball or hits a cushion, so I get my feedback pretty well from any cue ball. I can, however, see where it might be beneficial to some players to see exactly what kind of spin does what, as you can see the direction of spin better with the measles ball, but it just never was my thing.
As RandyG said, the ball was made for TV matches so the home viewing audience could see the spin on the cue ball. Great for that, but I'd rather just play, most times, with a red circle.
Bob