Disagree with your analysis as Lee helped Truman write “In Cold Blood”.
Now what I have been thinking about is the possibility that ,if this new book is legitimate, is Truman helped write that one and may outlined the original character of Atticus Finch given the thinking and feelings of 1930’s Alabama.
Guess we will never know the truth, since Capote is dead, and Ms. Lee’s handlers will never let her be interviewed.