The Scorions shouldn't have been a Clan by the time they attacked the Hansa. Their third exodus should have completely eradicated their infrastructure and if they didn't abandon dueling they would have eroded their hardware to nothing. The Scorpions should not have been able to cling to technology above what the Umayyad Caliphate and Nueva Castile maintained.
Ok, well there's decades of precedent against the idea that a migrating clan will have it's tech base degrade in the interim, and even more precedent against the idea that hardware can easily be worn away by attrition. This is battletech, a setting where running around in centuries old mechs that have been blown apart, salvaged, and rebuilt a half dozen times is a foundational part of the setting.
The Hanseatic League was advancing according to Sarna and hit 3055 Inner Sphere equivalent by the time the Escorpio Imperio invaded. It should have been a curbstomp by the Hansa.
Remind me again, how did 3055 level tech vs clan tech go back in 3055?
Also, it was really stupid at a Doylist level to even let the mess happen because it destroyed three interesting factions to preserve a Clan that hadn't had enough development to stand out from all the other home Clans. The only things actually lost when a Home Clan goes down is their totem mechs and their paintjob. Everything else is shared to a degree.
This I would also disagree with, for several reasons. First off, as far as I can tell there's not even enough written down about any of the three ex-nations to call them a faction, let alone an interesting one worth preserving. Looking at there wiki pages, they are groups that exist only within source books, without even a token appearance in the novels. They don't even have a MUL entry and the last Hansa mech was painted up and put on camospecs 14 years ago. The first homegrown Castilian mech just reuses art from the primitive Orion, and it was only outlined two years ago, well after they'd been conquered by the Scorpions.
I'm not trying to be mean here. There's the gem of something interesting here, that perhaps could be expanded on to create something interesting....but that was merely potential, there was next to nothing to those three and very little was lost when they were wiped out. If you were a fan of them nonetheless, well as a RoS fan I feel your loss, but sometimes crap like that happens.
Now, as for the scorpions, I will conceed that for normal battletech, there is not much to recommend them pre-conquest, and the new scorpion empire is just a periphery knockoff of the Rasalhague Dominion, but with more imams and fewer vikings. But as an RPG setting, and particularly a premade adventuring part concept, a Goliath Scorpion Seeker and his posse are a great thing to keep around, and if anything only moreso given the empire, and they're worth keeping around as a very cool plot hook for use in the tabletop RPGs. A hook that the components of the empire cannot make for themselves.