I'd suggest that the goal of any change should be to increase participation. Outside of Europe, a lot of crews are well above 150 kg. As one of those people, I find it extremely frustrating.

If I were to change the class, it would be to equalize crew weight differences. The goal would be for everyone to have the same combined crew + boat weight and the same righting moment. For example:

The current rules (2.6 m beam, 180 kg):
180 kg boat + 150 kg crew = 330 kg total weight
(180 kg boat * 1.3 m offset) + (150 kg crew * 3 m offset) = 684 m kg

A proposed boat for us big guys (2.5 m beam, 165 kg):
165 kg boat + 165 kg crew = 330 kg total weight
(165 kg boat * 1.25 m offset) + (165 kg crew * 2.9 m offset) = 685 m kg