Dude, I've been using your HoJ approach lately instead of fully ghosting and it's a lot of fun. Good stuff... well, until I invade a base with those drons that can disable everything 😂
I haven't built out all my platforms this playthrough (this is my 2nd time playing the game from scratch) but the game keeps all your developments the 2nd playthrough, so I didn't need to build out Combat
I always dispose of them. If Quiet+EW+AWH were not in the game, I might keep them, but that broken game mechanic prevents you from being able to deploy to defend before they're grabbed, most times