Yeah Zeta's pretty cool but... Aliens, Alien weapons, A death-ray, Beaming from beacon to beacon( theoretical ), A Cryo Bay, A factory that churns out robots, and a hanger with a drop ship in it, and a myriad of other little things is a VERY hard thing to balance.. If one faction or other obtains it and learns to utilize it, its literally a game breaker, as there would be very little if any way for the others to go against it and not get a giant glowing "F$^k You!" Lazar from space.
This by no means ...means I'm against it, quite the opposite, I'm all for it! But we have to be very very careful how we go about adding it in. Maybe its best to sprinkle it in very subtly bit by bit over a long time. A weird transmition here, a few odd lights in the sky there, perhaps a few out of place artifacts here and there, hell maybe even a bit of advanced tech
What I'm saying is, as moderators, consider throwing a few monkey wrenches into the storyline every once in a while... throw some excitement, intrigue, or maybe just a bit of random comedy into players story arcs every now and again.