Not that insane, but shields efficiency going from 0.3 to 0.6 is very good, even Tri-tachyons ships aren't that efficient. For their speed, after looking at their stats, they aren't as fast as i remembered, actually they can even be considered slow. They don't have capital ships BTW, their biggest ship is a cruiser but with the power of a capital ship. Their weapons however goes up to 1500 (medium mounts only IIRC). Also i think they have very good flux capacity and dissipation but then i'm going too much into the numbers rather than the lore, comparing number isn't really what i aimed when i made this chart.
They are still balanced though, as Meso said, without their shields, they are defenseless. They are mostly a sniper based faction with their Zaap guns with very high damage but long reload time, if you can close on them with a lot of kinetic weaponry, they're screwed.