Cam, I have had the v2 pre-asph and the v3 pre-asph, too. Currently I have a v2, largely because of what you describe above. I know the v2 and v3 pre-asphs are identical in terms of optical design, but I prefer the v2 and I do think it is because the "improved" coatings on the v3 pre-asph do change some aspects of the rendering -- not much, but enough to make the OOF areas a little less "sweet" as you suggest. In addition to the rendering of the v2, I prefer its size to the v3.
When I require a .7m MFD and absolute sharpness in a 50, I reach for the asph. It is the better performer technically, but for some reason I do prefer the 'sweetness' of my old v2 pre-asph in most cases.