I have no idea why this mixed gender craze would ruin the sailing classes like that. Hell, the mixed events are aimed to prove only one thing: that women can do just as great as the men and 470 proves that in spades without any additional nonsense already. Why on Earth would 470 be a mixed event then? That makes no sense at all.
I'm not even gonna say a word about kitesurfing. That idea totally blows. A lot of sailors who will be forced to switch to new event will be fuming IMO. Sailing hangs around the same top names a lot so it's not like some new talent will suddently swamp the new event. Another change for a change there. IOC is really losing the plot trying to make radical changes in literally every single sport out there.