Yes, you might be right. I did not count existing sails as they could be eligible for the rules prior, not necessarily needs to apply to the new rules, just the newly made sails should be.
The need for the rule was that Tomas had a bad accident on the last WC. He claimed that he couldn’t see the other as the windows are too small and too much at the back. I can agree as safety first!
I did not want to make a smaller minimum size than the previous max to encourage the sailmakers to cut bigger windows. The approximate 1 sqm max I suggested is not a very large size.