This might be worth touching up just for the sake of polish, but to be honest I never want to roll out another AoA update again. In the meantime I suspect you're in the clear codewise.
Wat? Conveniently missions are located in the Core package that is little over 200 KB large, so hardly a problem buddy. Besides, Core will have to be updated anyway at some point for some tabling improvements, such as better weapon loadout description for Balor.
And when someone gets to optimize new-gen Terran ships, Visuals1 has to be updated. Sorry, but there should be updates to AoA as long as BP is supported by its staff.