I dont think it would be detrimental to the game at all, so long as they keep it limited and controlled like PS has done. Also they could have certain requirements to be met before an airstrike too. For example the conventional forces would need a JTAC or a comm system that the opposing side can attempt to neutralize to stop it going through. (maybe too much but just my two cents) And for the INS forces it could be like a heavily armoured VBIED which have been used extensively. But as stated maybe only option for one per game if requirements are met and each side has the ability to counter it effectively.
Granted i agree it would be frustrating to be all hyped up in a last stand in a Rorkes drift scenario with your FOB under relentless attack only to be wiped by a Frogfoot/A10/VBIED but would still be awesome. I get just as frustrated when a grenade lands at my feet from over a wall. But hey thats modern warfare for you.
Either way, loving the game and hoping the Devs keep up there amazing work, what ever you guys decide, il be running behind your striker begging for a lift all the way!!!