For now, you can never return to sgs and you will not lose on anything.Yes, there is few quests which force you to return but it would be nice if there is was more incentive than that.For examples, it has a lot of rooms locked behind skillchecks so why not to put some souvenir oddities from other locations of game, living quarters for exmple.Or decision made through game affect shops, helping hathor or expanding influence on junkyard.
