The small aircrafts like Reaver and Mosquito could use an upgrade.
We have guided and unguided missiles, but I'm missing the unguided AGM, like in almost every sim (the GBU for example). Could use a small "expansion slot", maybe 1 or 2 shots. Not more than the C4 amounts. I'm no friend of the Cepher, because it's uber-annoying. But a real "Bomb" could be fun.
And/or at least the possibility to choose between anti-tank, anti-infantry or " for unguided Missiles, as it's already fit for rocketlaunchers, tanks and bombers. Why not for the lightweights?
I thought of some annoying thing which could hit me when I'm sitting all safe behind the frontlines, doing some scouting and then whoosh *boom* - gone. Could be a nice present too, if you're too damaged to escape, but leaving nice presents on enemy territory