If Mercedes was able to make their dual screen setup standard across trim levels in the new A-Class, I don't know why VW cant do the same. Although MB is a premium brand, the entry level A-Class is pretty reasonably priced.
VW also being part of Audi has to be careful, also they can't offer too much being a non-luxury brand. Looking at rivals brands, VW is doing everything they can. The Arteon is the only product I'd expect dual screens on and it does. Without, they're sabotaging the product.