Walt,
You are not listening to the people you asked an opinion of.
The majority are asking you to not act on your proposed letter.
You must realize that the governments response is completely unpredictable,
Maybe they will ignore you, maybe they will conduct a survey, I have a sense that they will not be willing to spend any money on a solution. But it costs almost nothing to ground a fleet. especially a fleet of mostly non commercial, recreational gliders and tow aircraft.
I have no faith that the FAA would be willing to differentiate between a Schweizer tow release on a tug and a Schweizer release on a glider.

Improbable, Horrible, Worst case scenario, All Schweizer release equipped aircraft are grounded, including gliders.
Could happen? ask the owner of a Blanik l13 with 200 hrs.
If I'm being alarmist so be it. But You must acknowledge you have no idea what the goverment response will be.

Respectfully,
Scott.