Right, because picking up and running away, leaving the planet entirely under their control for centuries, that really showed them, right?
Your people left, and in doing so, abandoned the culture they had in order to build a new one as a multi-stellar megacorporate oligarchy. Nothing you’ve said changes that.
I’m not saying that was a ‘bad’ choice, or even a ‘wrong’ choice. It was their choice, and they had every right to make it. But you can’t claim their departure was some noble move to preserve their culture as it was… because they clearly didn’t.
If they had, then I don’t know how willing they’d have been to accept Achurans as ‘Caldari’, since they’re very clearly… well… a different culture.