LOL task over load? He didn't have to look for a buddy, navigate, watch a clock or even the depth .. just stay above the the DM and he was even told when he needed to go up.. only kidding sorta.
I see what you are saying and it made it relaxing for me. I monitored my air frequently and kept on an eye on the DM and that was about it. Pushed record and carried the stick with camera around to capture what I could. I may drop the camera on some dives in the future but part of the fun of diving is watching the videos over and over when I get home, showing them to my kids etc.