I had a Synergy ETS that did that, but mine had a rather exotic drill. CG just above the fingers on the center line, (Ball had a 2 inch pin) Pin was above the ring finger and a weight hole beyond that. Ball had one of most wicked backend reactions I ever saw. At about 50 feet, i could see the finger grips on the axis. The ball did exactly what I wanted so I never questioned it. So if your new ball is reacting the way you want, then I see no need to change it.
And unless I'm mistaken about what reverse flare is, what you are describing is not it. My understanding was reverse flare would make the ball flare towards your Negative Axis Point. (I don't think I'm wrong, but if I am could someone please explain the concept of reverse flare?) The drill you have on this ball just puts the bowtie in a different spot so the fingers do the migrating, not the thumbhole.
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