Given the nature of the ball, a very weak resin cover and a core with almost no flare anyway, I think it is meant for the very driest of lanes on which a resin ball can possibly be used. I don't think the drilling makes that big a difference with such a ball.
If I were you, I'd just plug the thumb hole and redrill it for my own pitch and span. If it were hooking uncontrollably early (which is possibly but VERY hard to imagine), then I'd redrill it to place the pin at 6" AND above the fingers.
This is probably one of those balls where MAYBE, just MAYBE there are 2 posisble drilling that would truly make a difference: label and pin in the track.
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Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.