What was his outlook?
Did he disclose he made changes?
That some of the changes after V2 are ok. I know that sometimes he disclosed he had made changes, but when one says something is edited or revised and does not show exactly what has been revised and where it has been revised that leaves people in the dark as to what the real author wrote and what Thomas Nelson wrote.
I have seen originals of books and the corresponding Tan reprints which differed.