I have a couple of suggestions for you.
Call TA on Monday, make sure their booking is not marked “No upgrade.” That is, if they are willing to take another cabin, if upgraded.
And if not offered an upgrade, then the day of sailing, stop at Guest services, once OB and ask if there are any upgrades available to an Ocean view/balcony. Go enjoy your lunch and see if GS comes up with any offers.
Depends how full the ship is. Good luck.