One of the things that I think would go well with the, especially if you are making a new configuration page would be to have the ability to view and possibly edit existing jobs that have the emailext-template enable.

This is a quick overview of all the triggers. This could be taken to the next step where one could look at a tabularized data of jobs and templates and edit them on one page without have to go each job itself

This might be best added to the email-ext-recipients-column as they are sort of doing it already.