Remember, however, that those alternative sights are meant to be semi-secret. So you wouldn't want to directly dial the planets you explore from there. You'd probably travel by way of Earth allies.
Better yet, the missions might be related to the ongoing alliance with various worlds. The Beta or Alpha site teams focuses on keeping tabs on these friends and solving some of their problems- which sometimes leads to bigger missions than expected.
I know you just said you had it almost planned out. It was such a good idea my brain ran with it a bit
Hmm. Or maybe a Ceta-Sight, which is used as a base for undercover ops that can't be readily traced to Earth. That's if you want to emphasize the spy game over diplomacy.