Same issue for me. Received a text last night that my First class seat MIA-PHX-MRY was cancelled. They were kind enough to re-accommodate me on a double connection in economy that gets in 9 hours later. Great.
Luckily I was quick enough to be able to go in and make my own arrangements (2.5-3 hour hold time on the Platinum desk). Still a double connection and still arrive 9 hours later, but at least it's in my first class seat.
Great way to start out my first of many corporate trips that I have planned between now and the end of the year. :sigh: