Let's face it...for most OMB players, a discussion of chord substitutions is going to be of marginal interest. After all, as Chas reminds us, we're talking arrangers here...and the limitations thereof. I do remember the valiant effort Scotty made with his early support of rootless chords on arrangers and the corresponding lack of interest or even understanding of the subject.
I think what would be useful is a response to posts suggesting appropriate chord substitutions/improvements. That way, the contributor would hear options suggested for the purpose of making the performance better.
This, of course, is not going to work with the submissions I was referencing at the start of this thread...just plain bad work.
I guess my answer to my own question is just don't say anything about the really bad posts. For others, something like,"Good effort. Have you tried ......(a description of a possible fix/improvement)"?
I think I'm done here, folks. Thanks for the well thought out responses to what could have been a pretty volatile thread.
You folks are GREAT!
R.