you have to understand, these boats are built to go upwind. They are so fast the apparent wind is always close hauled or at least full-and-by, even when gybing downwind. The wings are held up by shrouds, which prevent easing the wing very far - it isn't in the design envelope. This also affects the hull design: since they never sail even on a beam reach (apparent) the bows are made very fine to minimize wave drag and pitching. Normally the resultant vector of the rig is sideways with just a little forward component. If you get caught moving slowly with the wind aft, that is a very tall rig pushing the bows down, and they trip over the lee bow. When overpowered with a gust, they often don't ease or head up, like most of us are used to, but head down because they will pick up speed very rapidly and reduce the apparent wind back to manageable. There is quite a lot of lift generated by the hulls up at the bow at speed - but very little reserve floatation at low speeds.

This can't be viewed as a design flaw, given the mission they are designed for. They are extreme racing boats built to do one thing very close to the edge. They wouldn't make a good cruising boat - but then a heavy CCA yawl wouldn't make a very good Acup boat for this series, either. They are like an F1 car - very highly tunes to do one thing well, nearly impossible to drive without years of experience, and totally impractical off the racecourse.