A good looking lens for sure. I read the reviews and was a bit surprized: one of those stated that sharpness drops at close range (say, 1:10) and wide apertures, and expressed his disappointment.
So what. The same can be said of the Voigtländer 58/1.4, but shooting at close range and wide open is asking for trouble anyway. No portrait shooter, I think, will shoot that close anyway (ugly perspective), let alone with a 75mm lens. At 1:10, either you have a 2-D subject, in which case stopping down is only beneficial, or you have a 3-D subject, in which case you won't nearly get anything sharp at f/1.5. At least with the 58/1.4 and past my first surprize (I was also a bit "disappointed"), my second reaction was "it does not matter (except to chart shooters)", especially when close-ups get brilliantly sharp around f/5.6.