I'd definitely like to see New York getting a Fallout treatment, but I'd much prefer if the city got its own game. It's just too big for it to be a DLC/expansion pack.
And I think we'll be getting some underwater DLC - some guy mapped the water bodies across the Commonwealth, and apparently there a lot of unused assets down there.
Less accurate? That's the understatement of the century. I've only attempted it once, didn't end so well for me. Even at a measly 10 yards i didn't put a single round into the target, and it wasn't a small target either. It's only done in movies because it's looks cool and in video games dev's usually balance it out to the point where you can actually hit something. Overall, worst thing to do IRL, but quite fun in games!
You know what would be interesting? You hear rumors of a clean, picket fence community. You head there, and fine a place that seems virtually untouched by the War. Heck, they deny it ever happening, saying that its all just one big hoax. You eventually find this peaceful city holds a dark secret. Maybe more Lovecraftian homages