Just booted up the franchise.
I have control of every team, but I can't verify if CPU roster control is on.
I seem to remember there being a difference between turning CPU roster control 'on' and merely choosing to control every team. Hmm...
But assuming it
was turned on, this is (potentially) great news. There were quite a few created players and attribute edits that are in the franchise, but not the base roster. Exporting/Importing will be far less tedious than the alternative.