Tigerman:Losing weight pockets sounds like user error rather than gear error to me.. All the people ive been diving with has used BCD with integrated weights and none have just "lost their weight pockets"..
Ok, you might say that I dont have many dives and i dont, but if you look at the number of people ive been in the water with, its still a matter of ~150 dives ive observed first hand (and been part of) with bcd with integrated weights and no issues (caused by the weight system)..
I wouldnt want to be sloppy with the insertion of the weight pockets tho, since they WILL come out easilly if you dont use the attachment systems correctly..
The design of some weight pouches does in fact leave them prone to falling out. Pouches where the opening is pointed down when the diver is horizontal and are only held in place by velcro are amoung them. One problem is that the velcro wears or just gets dirty and may not hold. I suppose you might consider diving with dirty or worn velcro as diver error but it is a weak spot in the design. Another problem with some of the designes is that all it takes is for them to get brushed by an arm or something to knock the velcro lose. That's especially true if exposed velcro (after being bumped or brushed)sticks to something like the wet suit clad arm that brushes against it. Divers in cold water may tend to overload the pouches but some just aren't designed to hold the amount of weight that a diver using an AL tank and a heavy exposure suit needs. Again, you might consider that diver error but there are plenty of weight pouches out there that don't do a good job of holding the amount of weight the manufacturer says they will hold. In any case I've seen lots of them fall out and have retreived a bunch for divers who landed on the surface after losing them and found many more just abandoned on the bottom. In recent years some manufacturers have changed their designed to address the velcro problems...after spending years denying that there ever was a problem. LOL
Since all of our gear effects buoyancy and trim it would seem to make sense to consider the whole package. Wearing a light tank with a heavy exposure suit with an inherantly buoyant bc (some of them are) and trying to cram all the needed weight into integrated bc weight pouches is probably the worst possible combination but it's also pretty common.