This is now fixed. my.tokens are now allowed in External URL follow-up pages for Forms 2.0 forms. Here are the things to remember:
Anyone run into an issue using the token on a form embedded in the template for an LP? For some reason it was unable to direct to the follow-up on the LP after I swapped in the text token with the TY link. However, when I replaced the follow-up with an html url it functioned correctly. I prefer to use forms in their own element so I have not encountered this issue before.