I like Freespace over "free roam" games like Freelancer, etc. because the "you're a lone rebel" got old for me. I like playing a game where I'm a part of a bigger military force (not just "friendly" to them).
Maybe taking steps to imrove immersion in Freespace style combat would be cool. I wouldn't mind being able to walk around the ship (command ship) in a very simple 1st person way. Something like looking at the command briefing, then actually having to report to your briefing by a certain time (game time) would be cool. In the few hours in between you could play minigames, explore the ship, or depending on the time, take a joyride in a fighter (land at a local installation, etc.). That's the kind of stuff I'd like to see, although it's far beyond what we'll get anytime soon.