Hey @Pcoombe, I confirmed with @CCogdill_WMF that the new TY email is approved and ready to go! Sorry for the delay, I've been unclear on our process (i.e., should the Global Campaign Manager play a role in the civi process?)
Here's a doc with the approved copy. You'll notice the 'localizable draft for easy translation' on page 2, but that isn't relevant to the task of updating our English TY.
Just tell me if I can help, and thank you for being on top of this.