While I agree with bluespawn's points, I want to point out that the nomads were actually asleep for 800 years, woken up, and pissy immediately after the discovery.
I'd also like to point out that Bretonia landed in 19 AS, and that Gallia landed late (launched late too), ergo they did not have 800 years.
I'm also going to complain (with a capital B) that Sirius was designed for the nommies, and its kind of ridiculous for Gallia to be better than the nomad's nursery.
Even then, with 800 years to build a fleet, you'd expect the first bits of the fleet would be of the same tech as the Beagle one probe, and with the fact that they had to steal the Valhalla tech through subterfuge, I'm going to assume that they didn't have nearly as vibrant an economy as early Sirius: Liberty was building gate and lane networks by the time Gallia had the blueprints.
Even though there's nothing I can do to fix the story, as its Igiss's magical playground, I will say that there are enough holes in it that I am more than willing to qualify it as a steaming pile of poo.
Really, add another house whenever things feel stale. You couldn't have dealt with the vibrant interconnections and politics displayed in vanilla freelancer, or furthered the multiple advancing story lines already in disco.
You certainly couldn't have done anything but invent another bugbear.
But what is anyone going to do about it? Steal disco and 'fix' it?
Yeah, that'd be...hard.