Keeth you have some valid points. My intention is not to totally deiscredit the glass. If you have that specialty need, much like Bryan posted in his review its a respectable choice. I dont have the need to shoot at f2 or wider very often and as stated before when I do the 85L is right there. As for colors and contrast I did notice a slight difference but found that bumping up saturation and contrast a notch put that to rest.
Im not referring to blowing up at full resolution on a 24 inch screen and pixel peeping either. Reference was to an 8X10 print, which is the norm max size for portriats, and viewing the prints side by side you would have to break out a loupe to see any difference and shot at f 2.8 to f 5.6 you will nottice the difference in sharpness with the 50 1.4 taking a lead and any perceived bokeh difference would be a moot point IMO. Eyes are drawn more to the in focus subject and if thats not defined........moving right along. to the next shot.
In not going even for a mniute going to dispute the superior build quality as with all L glass. I dont need weather sealing with shorter glass as when Im in the predicamnet its usally on a field with a super tele and have the approprite rain gear. Dont have but 3 lenes with me at that point, 70-200 2.8, 200 f2, 400 2.8.
Theres a lot that weighs into the decision. For me, in the end, the lack of sharpness past f2 was the deciding factor even weighing in that I could replace the 50 1.4 3 times and still have change should I breach the weather sealing or drop it. If I do it more than 3 times I need to put the gear up for sale as I have obviously gotten too old for it. ;o)