Have you driven a C8 Mark? I don't think the vert's vision is much different, if any, to the coupe. Properly aligned side mirrors should easily provide blind spot vision. Too many people have them adjusted to see to far forward. The turn of your head is supposed to provide side vision. The mirrors are for further back. I haven't driven one either, but any car I drive I only see directly what is right be side me. The mirror shows me what is behind the passenger door and further back.