@Brian G just going down the line
1. they are supposed to be stiff to make it easier/safer to get into and out of. If you don't like it on bare shoulders which I don't necessarily disagree with on land, then the neoprene sleeve or add-on shoulder pads are easier enough to deal with.
2. similar to above, unpadded crotch straps aren't very comfy in a bathing suit. My single tank rig has a padded crotch strap from Dive Rite that is super comfy
3. I actually have had to use that lever on a student before, but yeah, not a fan of that design in general....
5. why not remove the lower cam band if it's an issue? I have on some dive boats because of the tubes
6. I agree, though I do prefer horseshoes in doubles because it makes packing air to one side much easier for dealing with things like stage bottles
7. STA's=bad for packing, and the Dive Rite plates have a real heavy bend/spine to them, thankfully the DSS ones are flatter and pack really well.
9. In the water it shouldn't matter at all and if wearing a heavy ish weight belt the jackets actually usually are better because they lift at the hips. That said I just find them generally uncomfortable, especially at the surface
My DSS wing didn't want to play nice with my Freedom plate unfortunately but hopefully
@Eric Sedletzky can help sort that out for the aluminum one