Well I'm considering BP/W because I was able to wear only 8 lbs on my last dive as compared to the 14. I may even be able to take another 2 lbs off. It was comfortable underwater and not uncomfortable on land. Getting neutral took me a little longer in that I couldn't feel the air in the cell fill up, so I wasn't sure how much air I was actually putting in the wing but that improved in my 2nd dive. I think that comes better with familiarity. Once I achieved neutrality, I didn't have any issue. Trim was horizontalish but still needs improvement. That is more to do with being used to performing drills more vertically (sigh).
I realize that proper training and exp is the best thing for a diver and that tools are tools. But taking off a good 6+ #s is very appealing and if it puts the weight in a beneficial spot, the better.
If you can feel the air in a jacket BCD while underwater, you have
way, way too much weight on, so good on you for taking that weight off.
I think that this is part of why divers think BP/W have some magic to them, because here at SB so many people stopped sucking as divers and concentrating on being better divers, switched to BP/W at the same time so correlation leads them to assume cause and effect. Plenty of divers with fantastic neutral buoyancy and perfect trim dive in jackets. Far, far more than dive in BP/W, because there are far far more divers of all stripes diving in jackets.
Bad diving practice, like having enough weight that you can feel the air in the BCD under water, makes people look askance at jackets, because that's what most people train in, and most newly trained divers, and divers in training suck at diving. But it is not because of the gear, it's because of the divers and instruction.
Too much weigh on the weight belt is bad no matter what the gear, except for certain sidemount wings which can compensate for gross overweighting with air added right above the added weight when swimming in trim. And most instructors put students in too much weight for weird logistical reasons.