for all the flack cold steel get compared to other kiseki (meh to just decent characters, too much cast not enough depth) it is still my favorite world building in the series. the cast aren't as good as sky or crossbell, but man the world building and erebonia is fascinating.
the thing is, the world building isn't too much spoon fed like character development that comes naturally from dialogue in story cutscenes. you have to talk to all the random citizens, read news paper, do some side quests to get all the nuances, it helps to if you have interest in politics, sociology or history.
i found the effect of orbal revolution portrayed in erebonia is fascinating and multi layered. small example is like how orbal revolution presented an economic opportunity to regular citizens (reinford group, et cetera) even lower classes (by learning trade and "upgrade" their job as farmers to merchant or orbal crafts) , slowly displacing the noble's role as the sole major economic force in the empire. these social revolution brought by technological advancement also affect politics and how commoners start proliferating into goverment, compromising the noble's status quo even further that these events finally culminating into civil war, where osborne use the chance to take over and fulfill his own agenda.
