What you wouldn’t want is 2019 flu season shot triggering a warning for 2020 flu season shot. In that sense it is an improvement. As for a flu shot from this flu season triggering a warning for a flu shot this season I would be very surprised if the system didn’t trigger a warning. Not to mention I doubt most insurances would be willing to pay for the same flu shot twice in the same season.
As for an improved DUR system saving time...I mean yeah but in practice it’s the opposite. Fill a script for zestoretic sometime and enjoy the duplicate therapy warning you get.