One of the more interesting things about going to a bp/wing this year has been that I am carrying less total weight than I did with my Zeagle. With the bp/wing I need 22# with my neoprene drysuit and 20# with my 6.5mm 2-piece. The two are so close together because I use jetfins with the dryuit and they add a bit of weight. With the Zeagle I needed 32# with the drysuit and 28# with the wetsuit. With both systems I spent time in a pool with a nearly empty tank and an empty wing to figure out the correct weighting.
The question that I have is how much ditchable weight do you really need? If you are neutral with an ss plate and
2# in a suit that doesn't compress much, if at all, at depth, dumping 2# should get you headed to the surface. If you start adding gear then you may want more ditchable weight in the event of a complete wing failure. At that point the gear becomes ditchable weight. The one thing that worries me a bit about ditching weight is what happens if I ditch too much.
On the personal opinion side, I wouldn't go back to the Zeagle, or probably anyone elses BCD, after using the bp/wing and I am a single tank diver. Tooling around last evening with the plate was a lot less effort. Outstanding.
JoelW