If it makes you feel any better, I've been hearing a great deal of "I'm so sick of white medieval fantasy Europe" in geekdom these days, even from the white cis hetero male crowd. And authors who put characters of colour front and center in their writing, like N.K. Jemisin, are extremely popular. It's possible, I think, that GRRM represents the last great gasp of that ilk, and, if YA fantasy is any indication, the future will be much more representative of anyone other than the usual suspects.