I used the Positive Feedback round as a debrief for the last freeform I ran, and people liked it a lot. The purpose of the exercise is “both to improve your gaming skills, build a culture of communication and trust, and learn how to give and receive feedback”. I love that the player who is currently receiving positive feedback is not allowed to reply or comment. Just sit there and take your compliments!
It’s awkward and a little scary, but the exercises leaves happy players and for a tough game, that’s a great bonus. Highly recommended!