Haven't caught up on the thread, so forgive me if this has been said:
Settings can be humanocentric, but Parties of PCs need not be. They are already exceptional people (in various ways, even if you don't go to the level of exceptionalism that some groups do, they're still exceptional) so being a rare-type doesn't bother me.
Heck, with refluffing over certain combinations, I have occasionally built PCs (or helped to build them as a DM) that are downright UNIQUE, as in really, truly, one-of-a-kind.
So I don't mind a humanocentric Greyhawk with a party of pcs who are non-human weirdos. That's my take, anyhow.