ATC only works on primary weapon attacks. However, its not horrible with Prockets. You can always just spend the TL to make the Procket attack better if need be. I think 5 dice with Focus + TL is likely better than 3 w/ focus and the added ATC crit.
I guess I can't feel bad about forgetting the text on a card that is not even released yet but thank you. So the new title doesn't really do anything to help ordnance.