If Nikon's aim was to better Sigma's 50mm f1.4 and Canon's 50mm f1.2 with the new 58mm f1.4g then I think Nikon has probably succeeded. Tests indicate that the new Nikon beats the Sigma as far as Coma correction is concerned. See the links below for comparative tests carried out by Thomas Rubach - whose lens tests are published by CameraLabs.The new 58mm is also superior to Nikon's 50mm f1.4g, which exhibits significant coma at f1.4 as evidenced below, again thanks to testing done by Thomas.
The question is in what way can the 58mm f1.4g be justified, given its price tag. If one wants the best performance then clearly the Zeiss Otus is the undisputed choice. If better bokeh is desired then perhaps the 85mm is a better focal length anyway.