Here are my first impressions with some criticism. Don't think that I'm being negative, it's just that the great things about this game are pretty obvious by now and already have been mentioned!
-Framerate seems a bit sluggish sometimes when zooming or using free-look. Hopefully this is not as noticeable in multiplayer (...since it's less stuff on screen at once?)
-Looking around with gamepad can be a bit frustrating, since I always have to make sure to click it in before moving the stick. Pretty often I find myself lowering the throttle or engaging WEP, going into a stall or spin instead of looking around.
-Radiochatter is often annoying,
especially when they're played at the same time as the objectives are read, resulting in a mess of voices. The radio chatter gets pretty repetive as well, I got sick of hearing "Lower, lower!" every five seconds in mission 2 because I flew too high. It's not like I didn't knew that already, so I ended up muting it totally.
-How flaps and trim work isn't explained in the demo. I still haven't figured it what they do and how they work...