They probably have decided to make each of the instruments as good as they are capable of, and personally, I like the idea of Vln A, vln B etc. Maybe they'll come up with Violin C and D also, based on the same concept, but with different qualities.
I agree, btw, that the price of the Violin A is high. At the same time, as one of many who has bought into several string libraries, I would have preferred to buy into one 'concept' when I started (again) to buy sample libraries some years ago. The end price for a mocked up violin track today is also quite high - because many of us have bought 5 (or 50) libraries. Knowing how expressive and playable the legatos are in the Con Moto series, this could possibly mean less need to buy into many other libraries to get an as good result. As an example - if Mural had been as good as SSS later turned out to become, or how good SCS is, I probably would never have bought Mural. Likewise, if I had bought Berlin Strings first, I probably wouldn't have bought SSS, and definitely not Mural (even if my initial response to Berlin Strings was somehow disappointing, because the initial impression of the samples was they they weren't as 'in your face' as the Mural samples). So - for someone who really is into the con moto concept, maybe the higher price, lack of other articulations and and the Vln A vs Vln B thing isn't seen as a major limitation. In general, I'm personally much more interested a library which does what it is supposed to do really well – compared with libraries that makes you keep wanting to invest in new libraries.