If you come to a full stop whilst submerged your boat will not float to the surface but rather rise a couple of metres....this copies the positive buoyancy of a submarine.
Fred has explained the adjustment you can look forward to in the forthcoming GWX v1.03....however you also have to consider that some people like GWX the way it is curently (v1.02)....so really i reckon it doesn't particularly matter what the buoyancy behaviour is because there will be those who approve and those who disapprove of whatever buoyancy type is used. :hmm:
There is always the choice of stock/vanilla 'hummingbird' for those who can't decide