"I can understand why you would think this way about our S. You have some great points here. He's doing well, but I believe some things you suggested could be part of a good plan for him to do better. Would you be open for a coffee sometime so that we can discuss this in person? Email might confuse us on a few points. Let me know."
I guess that could work if you want face time or at least it's an example of how I would get thru it without a point by point response. It validates, but you don't say "yes, of course dear" as the terms "some" and "could" are non-commital, yet buried in a welcoming context. Don't want face time? Go for a phone call. Don't want either, cut that part out. Seems over the S though, you gotta communicate on some humane level. I know from my sitch, the emails back and forth over the S turned into misunderstood crap and a phone call fixed it pretty quick while it stayed business.
"There is no more important fight than the one for ourselves. Keep on winning." Ginger1, Read her newbies. BD: Feb '16 D: Mar '17 Piecing: Putting the self back together was my piecing. S6