Why not give all people what PC users can have in the form of being able to spawn all different types of robots, creatures, ghouls tc by shooting a flare or throwing a special canister and they will spawn where you want them too. You could spawn an Assaultron amongst the Forged and so on and set up fun battles. Just an idea

I just want to be able to actually drive a vertibird and do what as I wish with it

I don't know about that. PC users can use console commands to spawn these things, but this isn't really part of the "game play." What you're asking for is a game mechanic that lets you just toss a canister on the ground and spawn a deathclaw or an assaultron or something. Something like this could possibly be done with a mod, but I doubt you'll be seeing anything like this in DLC.

I'd love a DLC about another region like New York (I would prefer a full game devoted to NY) where we can establish our own faction. Build a group from the ground up (a couple names to choose from) and define its ideology, morals, methods, etc. and then expand the group to the Commonwealth as an outpost.

Obviously the group could make use of assets like vertibirds, flares and artillery as other factions in the base game do.