Steve, I think that your emotional investment in this topic is getting in the way of reasonable discussion. As a product designer I know where you're coming from, but all professionals have to eventually move past that.
As a designer I'm sure that you're well aware that there is no such thing as a perfect design. Even designs with unlimited budgets entail compromises. By the same token, everything can be rebalanced/reoptimized if not improved outright, so in that sense nothing is ever "done". That's why it's a great thing that there are so many to choose from and (though it may make you and other designers/vendors uncomfortable) discuss.
I never said that they needed a keyway or had a bad business model. W.r.t. the former I advanced a hypothesis as to why they may have removed the keyway that the Preston had. If like WM you advertise that you're producing an improved version of some existing design, then you are inviting discussion of the changes you make relative to that design, because those must either be things that you felt were improvements or things that you were forced to do for one reason or another (cost, material constraints, etc).
W.r.t. business model read what I wrote and more importantly what I was replying to. My comments were in response to somebody else's assertion that the customer was entitled to something extra in terms of service because their price was very high.