Looking good. Played through first mission without incidents. Half way through the second one after clearing a target, we got ordered to get moving. I told myself "you bet there is some bastard just waiting behind this fence". And there was. And he got me. On reload I got 2FPS and quit. Not sure if this is a mission problem or a general OA problem, but I've had this also in MP but then always accompanied with a game crash on exit, which didn't happen now. (No heavy mods used, I think only a debugger).
One thing I miss since there hasn't been any voice so far, is some kind of cue to read the subtitles. Even if it's just some static click noise on the radio indicating that a radio transmission is going on.
So far, nicely done.