I have found that in these situations it is best to actually try to 'book' a flight to see if your flight is really available.
We have had flight number/time changes and we were put on less convenient flights. The airlines aren't always the best in communicating changes.
Six month and post Irma I think there will be more changes to come. <img src="http://www.traveltalkonline.com/forums/images/graemlins/cry.gif" alt="" />