I don't think OP is closing the consideration loop, but rather adjusting the date until Nov 30th. She probably closed the loop before the announcement.
aside from one or two rogue immigration offices, the adjustment to Nov 30th should be fairly quick and easy. I would take care of it this coming week since most offices don't seem to be too busy right now. Things will definitely start picking up as the date draws closer to the 31st.
Personally, if I already did the consideration follow-up, I would wait until I hear confirmed reports of people getting the Nov 30 extension before attempting to go to immigration again. It might take a few days for all the offices to get on board. Plus its only Oct 1st for goodness sake, LOL.