What is special about this particular price of glass?
It has a nearly symmetrical design, which means a low level of distortion, coma and lateral colour, which, even if you don't care about distortion and coma for your uses, means better "sharpness" in the periphery than most "normal" lenses. As you say, "normal" for 36 x 24 is 43mm, but there is no lens closer to 43mm except the Nikon 45mm, which gives up a stop and is ergonomically terrible, and in any case sells for as much second-hand as the Voigtlander costs new. The old lens was beautifully made and a pleasure to handle and use; the optical design of the new lens is the same as the old one, and there is no reason to think the build quality will be different.
The people for whom the lens is
most special are users of the FM2/3; the size and weight match better than the Nikon 50mm f/1.4 AI-S and it is superior to the Nikon 45mm f/2.8 (the kit lens for the FM3) and the Nikon 50/1.8 E series. The old lens was also a good "normal" lens on modern cameras whenever size and weight were considerations, and for people who just like a looser "normal".
Whether the gain in size and weight with the new model, and the removal of the inverted cone shade, changes anything we will have to handle the lens to see.