I would support a rule that permitted the taking of any antlered deer with a 15 inch or greater spread, regardless of the number of points.
No method of AR is perfect as you pointed out. You mentioned the wide 6 pointer. I have a 152" buck that is 14 3/4" inside and my buddy shot a 169 5/8" Whopper on Our Illinois lease that measured under 15" inside.
Point count is the simplest but not the best way. Antler spread works too but not in enough cases as I've illustrated. The best way is a score method but it's far to complicated to use in widespread fashion.
For the masses of PA, the point count may be the only feasible way. JMHO!