I am not really part of WLYDO and have no business commenting, but first let me please say how much I enjoy reading all this and how much I learn.
However, I am an engineer, so I have some ideas about what goes on in engineering design and development.
I suspect the root cause of some of the controversy here is that the design project started from the wrong basis. The project started with the solution: davits. I think it should have started with the question: given boat design A and dinghy design B, what is the 'best' (best is to be defined) way for boat A to haul around dinghy B? Davits are but one solution. I think that with the right question, the 'best' solution can be found.
I thought my question about Dink B was a pretty good one:
Why would anyone have such a boat without a motor?
Expanding on it, if the desire for such a dink is based on the performance under power, I get it. I can't think of another reason to have a dinghy with that design, and if the desire is specifically to avoid an engine, lots of alternatives open up that would not be available if the dink is to be powered.