I heard the loud clack on clutch release from the trans/differential the second I turned out of the dealership. Somehow that had fixed itself between the time I dropped it off and picked it up too.
Assuming the creaking wasn't blend door related, (there are constant minor adjustments being made when HVAC is on auto,) don't be surprised if that comes back. My seat was creaking but primarily only as I shifted to get out. That minor annoyance thankfully fixed itself. I suspect a heavier person just needed to spend some time in it LoL.