I dive my one-piece harness all the time. A while ago, I put a clip in an old harness to experiment and it was a PITA.
You really want to put a clip in by your shoulder to be able to find it easily and so your hand finds it naturally. Unfortunately
this is exactly where some fool decided it would be a good place to put a D-ring, so that I could find torch, spare double-ender, clipped off long hose etc easily. The clip was a total PITA and virtually impossible to undo....
So I reverted back to my one-piece no clip and guess what?
It is easy to de-kit in the water wearing a drysuit, a 5mm semi or a shortie, it works with twin steel 12's, ali twin 80's or just an 80.
I used it when diving from a hardboat (with lift) an enormous hardboat (with ladder) and a RHIB - no ladder or lift.
I am rather hoping it may work when I go to Florida, with a dry-suit and twin 104's - and no boat at all but we'll see
In my humble opinion, it is probably a matter of information needed to release an unconcious diver from a one-piece. However, most peoples kits have their own idiocyncrasities, and one would be hard-pressed to find a clip or a buckle on my (norfolk) clubs kit - but that would be because they were hidden under ropes, torches, goodie bags, crowbars and yore amount of flags, SMB's reels and Christ knows what else...
If in the meantime, an untrained diver needs to rescue me, please feel free to use either a knife or snips - or bolt-cutters if necessary.
Di
* Deflate the wing (some) you now have more room. Slide the webbing down one shoulder, roll diver out, slide off other shoulder, rig will fall away. BUT make sure that long hose, suit inflate, neck-laced reg, waist strap, crotch strap, weight-belt (if wearing one, but check) have all been removed/released and nothing is attached to the diver. And, if you need to, add some gas to the suit.....
Of course, if you like the diver, at the same time you release £2k's worth of kit, you could always hit the wing inflate button
