Sorry Bob, I was being facetious... not always a good idea on the internet. Of course I don't believe that any iteration of the Schneider lens companies 'designed in' that little flaw, if indeed it is a flaw.
I've worked with quite a few Schneider lenses in my career, in some rather demanding applications, and have never been dis-satisfied with any of them. Nor have I ever seen any effects,positive or negative, that I could trace to whatever 'Schneideritis' is.
Perhaps someone will find two otherwise identical lenses and run a test. Good luck with that- and do post your results! While someone runs that test, I'll be out making photographs with my 1957 121/8 Super-Angulon, Schneideritis and all.