I have the nikon and have no complains , it is my favorite lens , high contrast edges have CA , but for my use, mostly portraits, it has not been a problem
There are times when I wish I had VR, using higher ISO usually solves the problem
Weather sealed would be nice ...
Sharper ... for portraits? ... and then bring the image into PS to blur the skin blemishes ...
Smoother bokeh, yes I would like that
More expensive , I do not like that
Better manual focus ring , hmm, on an autofocus lens does not make much of a difference
Heavier , probably good so lower speeds can be used more consistently without the need to use VC
Anyway it is good to see competition, the lens I'll like to see come out is the sigma art 85mm
Thanks for the link to the video