I'd prefer it was set on some fictional island. The devs wouldn't have to honour any real geography, and could design the maps the way they want to. Want snow maps? Add a mountain range or put in seasonal weather.
Similarly, I'd like fictional factions. The opposition in SP could have the same toys as us, and it wouldn't have to be US vs. US in MP.
I want night vision. If there has to be thermal vision, map it to some other button. There are night maps in GRAW but, with the thermal/night vision, I just turn up the brightness and turn them into day maps.[/MandatoryNightVisionRant]