I expected at least one reader would point this out, maybe two, but plenty more than that did. Fortunately, I had always planned to address that. I needed to clarify exactly what Sarah meant anyway, so may as well give a nod to the fact that one technically already exists (and address why that's irrelevant).
Really, "V5" has taken on it's one meaning among Tedd and his friends. He may want to consider labeling the variants using letters from now on and just have V5 exclusively refer to gratuitous "I thought this would be hot" variants.