I don't know if this has been suggested before, it would be nice to select your commendation for someone during the trial/dungeon so they don't miss out if they leave quickly.

This would work well if it was possible to also change your commendation before the trial/dungeon finishes if someone else has performed better.

I really think this will make the final part of the dungeon feel less rushed, as you know the person you wanted to commend has already been selected.