Expansion first, snowy forests and lots of tense indoor action
And then GR2, with a twist i think Body armour and camo choices in the kit selection would be nice, and how about the points system being altered to reflect the individuals playing style. If you wanna go in Rambo style, your stealth options decrease and your endurance increases...that sorta thing..as you increase in one style of play, options inherent to that form become available whereas others disappear...just a thought...not strictly RPG but could add a new slant on SP..not to mention importing your fav playing style to MP