I think for XI it's mostly we didn't get to explore the actual homelands, i.e the Northern lands. Where beastmen existed was merely bases and migration patterns for example Davoi was a claimed Elvaan Settlement and Castle Oztroja was a strategic point to assault Windurst.

Given that excluding Garleans, the other existing tribes have some form of society but they're still pretty much savage beasts which set up hubs rather than full blown cities so I doubt we'd ever see something like this unless it was in the form of a dungeon. We also have to remember that given SE's attention to detail, things like Beadeaux was a swampland they (Quadavs) called home so it wouldn't resemble human cities for example. In XIV we also have human factions who are basically rogues, you wouldn't really see a city dedicated to them like in FFVI versus small camp type areas.

I think it worked better in offline games than it does in online games because online you have a lot more to worry about, i.e economy so everything has to be dealt with delicately.