Since we're only concerned about the retail FS2 campaign(as said, mod-makers can always revert the firing points for their mods if needed), how many missions is the Boa really available in? Slaying Ravana, the 64th Raptors missions, and possibly the last few missions with the Blue Lions. The Trebuchet doesn't even become available until you're with the Vasudans(first mentioned in Bearbaiting's briefing), so that just leaves the very last missions of the FS2 campaign as possible concerns(I don't remember for sure, which, if any, let you fly bombers at all).
EDIT: I'm sure there are MP missions where it could come into play, but as mentioned above, it's not letting you do anything you couldn't do in some form or another, anyway.