Don,
The personal observations of a very few individuals can be nothing but anecdotal.
OTOH I spend a fair part of most days speaking with divers who are interested in BP&W's. I'd venture I've had personal contact here, on other forums, via email and the phone several thousand divers.
Many of these have become customers. Fortunately most have been quite satisfied with their BP&W. Many are repeat customers.
A majority are primarily single tank divers.
A majority dive at least some of time in warm water.
Vanishingly few have reported any of the fit or use difficulties reported by the OP.
My door is always open to my customers, I answer my phone and return emails. If there was a wide spread problem with comfort or ease of use, etc. I'd know about.
I'm not here to say the OP's personal observations are invalid, but it's well to remember that many many 1000's of happy BP&W users exist.
Tobin