Here's the problem most folks have missed. A multiplier for open zoned schools would be like banning the dunk in college basketball because of one unique player. If open zoning were the only issue, then where are the other dominant programs? Alcoas success is the result of a convergence of several factor almost impossible to recreate.
1. The hiring practices of the Aluminum Co 100 yrs ago.
2. The location of the airport and the tax revenue it generates (quality education).
3. Add outside coaching with strong discipline and conditioning programs.
The result is what you get now. My point is, if you put a multiplier on open zone schools, Alcoa (Alcinder) will most likely still dominate, 4A schools will whine, and other open zone schools will whine when they have to move up. The bottom line is, to quote JFK, no one ever said life would be fair.