Hi Chris,
The autosave feature was rolled back because Google set new quota limitations for how many times the add-on can call to Google Drive. ( to save the template, and write it to the spreadsheet in a separate tab)
This was causing users to see "Too many simultaneous invocations" errors while using Form Mule & they would have to wait until the error passed to edit/save their email template.
I understand why this feature was useful but unless Google increases the quota in the future, I don't see the autosave feature being reinstated.