If your PAP measurement is accurate, and the pin is 3-3/8" from your axis, then, no, a flare-increasing-hole will not have "a great effect on overall hook." 3-3/8" is at the limit of the track flare effect. You should be getting about 3/8" separation between flare rings. A flare-increasing-hole MAY increase the distance between flare rings for you (visibly), but you will most likely not see any measurable gain in hook potential.
What sort of surface adjustments have you made? If you're lowering the grit, it's possible that it's burning up. On the other end, Activator+ can be really touchy when polished (a la Intense Inferno).
The first thing I'd do, though, is double check your axis measurement. If that was off an inch or so either way, then you might have more options with the X-hole. But, for sure, tell us what surfaces you've tried. We might can offer something you haven't tried yet.