Well America's cup was always about virtually unlimited racing
. It never was about who was the better sailer, it was always about who had the better boat.
I would say leave it open. If it takes a billion dollars to compete, so be it. I never plan on entering a boat.
From the beginning "edging" the race
rules is what kept the trophy, (usually outlawed the next year, but it made for some interest to see what the racers would try next). An unlimited race
isn't a race if a faster boat is disqualified out of "fairness".
And I would prefer to see an ungodly contraption win the race, than see a bunch of old wooden monohulls with clipper sails
slowly creeping across the course.
If that's what YOU want to see,... organise a race.