In rough seas around here I much prefer to giant stride with my DSLR. Trying to get close enough to grab a camera from a large boat that's slamming back into the water with every wave is not safe. I wear a drysuit and stiff fins and find I can control my jump....by the time the water's up to my chin, I'm not moving very fast so my camera rig hits the water gently. No disasters as yet.
Agree with this approach but make sure that there is plenty of air in drysuit and/or BCD. Also keep the rig above your head and that way the camera will only just enter the water slowly and gently.
I used to have the camera passed to me whenever possible but when I was diving in the Maldives a few years back I would drop in to the water, keeping close to boat and have camera passed to me. This was fine until I ripped my hand open by being too close to boat and catching hand on a piece of steel which was sticking out. Made a mess of my hand and the diving for the rest of the holiday.