I'd like to start by saying the new version if bloody awesome, but... yes but, I have an idea.
I personally feel that all the time and energy put into the original version shouldn't go to waste. After completing the new version you'd unlock both it and the original in the Mission Replay system. It'd allow new players to see first hand how the games improved and it'd be something unique to the aforementioned system. You could just add (Original) after the mission name and the original accolate Above And Beyond. A different set of rewards would be nice, too. Let's say a second chance at the Khitomir Crisis Bridge Officers.