From: Washington D.C.
I like the bunkers idea. I'm not sure about AAA because I'll need to rationalize it to myself in terms of the order of battle, but I do think there's not enough MANPADS. Something I have thought about, though, is that massed smallarms fire would be a thing in real life, but Command doesn't really do that, although it could with minor database changes. That's important because when I roll in with my drones to start picking out targets for follow on strikes, they have free rein. That's not realistic.
I already have SSKs. Those usually get hit by SSNs earlier, though. Sometimes I lose one.
Originally, I had the idea of some kind building some sort of quick reaction force, but when I looked at the order of battle, it wasn't clear that I had enough to do a static defense at the beach, defend the airport, and maintain a QRF, given the assumption that they'd do simultaneous air and surface assaults.
Mines... can't do that. Water's too deep.
SOF... meh... doesn't matter.