The problem is that space sims such as Freespace2, Alliance, I-war (arrgh that game was sooo good) Freelancer, etc...
have all turned out to be high cost investments with low return. The market group for this game type is to small to offer enough income to make a profit on. The ONLY way you are going to see any new high quality game of this type is either:
1. somebody crazy enough takes the finacial risk.
2. This game type is combined with another, such as the battlefield series. ...hmm now to think of it...isn't Dice doing a battlefield title that is based in the far future?
3. there are a few offerings out there from indepents that you can find on the net but they are not so good.
4. I suggest you get your hands on FreeSpace2 and download some of the awsome mods for it. or Get bridge commander and get some of the incredible mods for it...or both. Totally Games made the best space sims but those games are hard to find.