Seems like a lot of effort for something that I expect would seem counter-intuitive to a number of people (myself included). Even if in real life nuclear missiles would explode in the air, I'm used in games to seeing any kind of missile explode on impact, and to impact the ground/units (not just in FAF but RTS games in general).
Therefore I worry a significant amount of time could be spent on something that ends up making the experience worse for more people than it improves it for (assuming that from a balance perspective it's done in such a way that there's no change in terms of the gameplay effect).