I believe the use of the auxiliary return spring was related to the Hy/Rd, not the Spyre. The recall does not affect the Hy/Rd. Use of an extra return spring on the Spyre would seem (in my opinion) like overkill, since the spring tension on the stock Spyre caliper seems to be very great especially as the rotating arm begins approaching the barrel adjuster.
As to the date of when they would have replacement units, the time frame stated was 2 to 3 weeks.
When I mentioned mid-January it seemed like a "yes".
If you want to replace your Spyre unit, the procedure is to email them using the email provided on the bulletin. If you call them they will probably tell you to use the email (as they told me over the phone).