Put most if not all of your weights on a belt and make the belt the last piece of equipment you put on so it can be the first thing to come off unobstructed in an emergence (...) You people go on endlessly about holding a perfect hover and integrate your weights to better achieve that goal. This is NOT a good idea if it comes at the expense of your LIFE!
If one accidentally drops the weights while diving under ice,
(a belt carrying 16 lbs of lead may be difficult to tighten properly around a diving suit; I have bad personal experiences)
then that person will end up pinned against the ceiling. This can be an unpleasant position as the hole in the ice is not visible from there. One needs to descend to see it. Any lines on the bottom may be to far to follow, too. So... where's the exit? How do you manage to swim while feeling the pull of the heavens and beeing flat against the roof? You'll die, unless of course, the ice mercifully crushed your skull.
A fresh diver may drop a weight belt by mistake, and get scared by the speedy ascent. With a drysuit there is the added excitement of escaping air through the neck seal and hence lost visibility. In that cloud of bubbles and hearing the OPV's pop, the diver may hold his/her breath and get a burst lung. Don't know if it hurts, but it probably only happens once.
Dropping weights under the dive boat may hurt, too.
Integrated weight pockets (secured with velcro and clips) can be dropped one by one, are safer attached, and more comfortable.
People that do not have any droppable weights usually use at least two buoyancy devices: both the BCD (or wing) and the drysuit.
The diving history is riddled with deaths of people that did not ditch a weight belt or weight pockets. Some of these accidents are recorded on video and they are not fun to watch. In distress people do not think clearly. If one has never ditched weights on practice dives then (s)he will not do that in an emergency either.