Your letter comes across like you're somebody who's had experience with being tactful but straightforward and honest. I know a fair number of people - who are good coaches for the right people - who sincerely believe that the "aversive" approach is the way to go to tuffen ya up. It's not good to put 'em in charge without an "out" for all the folks who *don't* want/need that schtick.
About the only time folks have seen me angry has been when a ride leader has talked the "nobody will be dropped" talk ... and then didn't believe that no, honestly, there really are people who ride at 11 mph and that is appropriate for them. Our last Tuesday first ride of the season averaged 8.9 mph. and it was the right speed.