The comment about the schedules is telling because AA reduced the number of banks but increased the volume in the banks. The result is lots of airport congestion and waiting for gates. MIA and DFW are a zoo. So it's either a very risk 45-60 minute connection or a 3 hour connection.
As it is when I arrive at the gate I usually see some poor guy yelling over the airport noise into a MS Teams call (most business travelers are not going to be using an airline lounge). Poorly timed connections and doing work at a very crowded gate aren't going to go well together.
As far as the status extension if one of the US3 does it they all will I just have doubts that AA will lead the pack.