I want to support your viewpoint that this lens is without fault. I remember when I got my hands on this lens many years ago; the review was harsh enough that I seldom use it.
However, over the years, when I had the chance to use it, I found it very sharp, with good contrast, and very convenient to carry when traveling.
The reviews that badmouthed this lens have disappeared, but I keep it nearby for use.
Here is a recent picture I took to show the capability of this lens at the break of dawn, see the contrast and color it produced!