Maybe they are first developing lifting boards then work on the rudders, makes sense to me. Get the boat to lift off then control the attitude, one step at a time. This could be awesome.
Maybe, but you do a lot of damage along the way. If the main foils lift, and then ventilate at speed (ie instantly loss all lift), then the whole nosedive is a helluva lot quicker. Mainly because the hulls are pointing downwards and then hit the water. Done that many many many times on the moth. The whole nosedive cartwheel experience a lot quicker than i have ever experienced on a cat.