I'm going to have to read this a few times to get my head round it and maybe try working out with a pencil and paper.

But I do know for a steady dealer the ball release speed is about constant and around time period 0.5 secs. I guess you are matching the rotor speed to this, so in effect you are measuring the rotor speed or at least seeing if the rotor speed is within range.

Put it this way, ball speed is difficult to measure accurately early in the spin. For me anyway. The difference between say 0.45s and 0.5s is 0.05s which is very small, so would need several revolutions at least to measure. Whereas you can pick a difference in wheel period say 3.0 or 3.2 or 3.5 more easily.

Only thing I would say is on a long scatter wheel you will probably need a drop zone as well to get an edge. The justification I'd put forward is my experiment on dealers sig in this forum where I did 1000 spins on a wheel with a dropzone to constrain fall off. I also used same wheel speed,  same ball speed  (as good as I could manage) and same release point. Even with all that there was just a discernable area (a good 1/3 area too), which is a nice zone for betting.

But I am sure If the wheel were more levelled, that zone would be flattened. It's an experiment I should repeat with a wheel as level as I can make it.