it looks like in the sailing video; the boat getting up to high speed then is looking like it will go to foiling like in the AC, but then the boat blows off the extra lift and slows down to like 6knts boat speed.
So it's counter intuitive to penalize a team that is trying to shift gears and having the boat go into a "restart" mode. Even though sailing skill will undoubtedly compensate for this eventually.... They will have to pick a mode that works for the boat. High mode with 2 in the trap had it's problems in that vid.