The thing that could be done is exactly the thing that isolates multis from the serious mono racers. That is SPEND MORE MONEY! Granted, by and large, multi folks dont have it like a Farr 40 campaign. But the simplest answer is to build a boat that is both wider and lighter or as light. And what does that require? Lots of carbon fiber. An extra 50 grand or so and no problem, an equally fast boat wider, and with lots more righting moment. Sadly, the money game strikes again.