Yeah, 30 boats dropping 6-20 divers per boat all on the same stretch of reef and then each boat trying to keep track of their divers while trying to avoid the other 29 boats. No thanks.
No problems in Egypt and other places with 30+ liveaboards and 50+ zodiacs in a small area. Divers come up under SMBs, zodiacs cover the divers.
The rest of the world has worked out how to do it so would seem odd the keys can't work that out.