Well, the recent Lucanii Drift is a sourcebook for that game system that somewhat addresses that issue, being twice the size of S&S2 at 184 pages. Not only does it provide a proper sandbox setting for the game, it provides additional rules
Inside this book:
- Expanded starship combat rules
- New Equipment
- New character races
- Additional character generation rules
- Rules for improving and developing starships
- 15 sectors to explore, filled with conundrums and discoveries.
- Hundreds of encounters and adventures
Ordinarily a pretty good value at $7.99, right now it's only half that.