Love the ideas! For the newsletter concept it would be good to circle back with the priests and find out what they felt was most helpful. Perhaps have them highlight on the newsletter which areas they felt helped them develop/guide their homily development.
For the 5E’s, remember for each idea how your user is “enticed”. This is a big hurdle of how you will compel participation. Implementation of ideas is always the toughest part!
*Just like with your ethnographic research, you will want to capture video, photos, and direct quotes.