i had compared the 16-85 to zf primes 50 & 85mm before.. sharpness for the 16-85 is resonably sharp, one of the sharpest kit lenses
the comparison was done at closer focus distances, not at infinity, both ZFs may appear to resolve better than the 16-85, but i admit i cheated a little, cuz on the 16-85 i used AF, but for the ZF, i bracketed the focus on manual focus, took abt 5-6 shots with very very fine focus adjustments and chose the sharpest one, this was with the aid of a focus screen and the green dot. it appears that very minor adjustments, affected the pixel peeping sharpness
chances is that on near field focussing, not at infinity distances, one may not get superbly optimal resolution unless they've been well accustomed to focussing accurately and properly.
that was why i gave up all my ZFs, because what i was shooting, didnt require that sort of resolution when my AIS nikkors could give me the bokeh i liked.
yes, the coating of t* has an effect on the contrast of the image and the color sensitivity, but proper choice of the right nikkors, they too have similar properties. not all nikkors are up to that coating standard, actually.. most are not.
It's actually not a big surprise if ZF glass manages to outresolve a good proportion of lenses from more recent manufacturers. That's where the appeal comes from I suppose, otherwise those who are forgoing AF just to use all this alternate glass are simply fooling themselves.
What you said however is entirely right. ZF glass might be sharper, but AF could well be more important than the difference in sharpness, contrast and colour and it would depend on the individual user to decide what is more important. I've generally stuck to still subjects and hence MF is not a big problem. Increasingly I've moved on to portraiture and realized that AF could occasionally be helpful, but have thus far managed without it anyway.
There's some talk about older Nikkor glass being superior to even some of the newest optics. What's your take on that statement?