As a user of Seahawk crew hover some years ago (as a winch op), it is invaluable for person in the water or life raft pickups.
For crew hover to be engaged, doesn't also radalt hold have to? If this is so (from my fading memory), won't this cause an upset as you move over the vessel? Best case it will initiate a climb but worse case the auto hover will drop out especially with a big mismatch.