FR isn't terribly specific in any way, really.
Oh, sure, it's got some of it's own stuff, and when it tries to do it's own stuff it does a pretty great job of it, really. Things like Thay being a magocracy with the eight zulkirs and magic weather patterns causing problems for neighboring kingdoms and no need to chase after escapees 'cause they'll either die in the desert or return. That stuff is pretty choice!
And it has, in turn, spawned things that other settings have taken for themselves. Like the Weave or Elven Mythals. But mostly it's pretty generic, like Golarion or Mystara or Greyhawk. They've all got nice special specific-to-them stuff, but the settings are broadly applicable to many takes and styles.
Generic is only bad to people who complain when their Frosted Cereal or Handbag doesn't have the right label on it to make them feel special. For the rest of us? Not so much.