I was on the same cruise; never had any Medallion problem. I also did not download and receive the Medallion prior and was still on board quickly. Only problem I had was suitcase wasn't delivered until 7:30PM, but that's most likely a NY problem.
As for mini bar change, I just called their direct line instead of pressing the room service button on the phone. They answered immediately and said change could not take place until the next morning. OK. No biggie. Hank said it was his 26th Princess cruise. It was my 81st.
Medallion worked perfectly opening door and amazingly at coffee bar. Even wearing a zippered jacket, it knows who you are. It also shows the server your photo; same as when getting on or off the ship. I still had the old coffee card, which should have expired on 8/31, but they allowed us to use it for the duration of the cruise.