I would love GRRM to explore Essos (and Sothoryos) more, but everywhere in Essos except Bravos and too few other places have so much slavery that I feel sick reading about it. I could stand reading about Daenerys fighting slavery in her chapters, but it's still painful. Even the Ironborn treat their slaves (yeah, yeah, I know: "thralls") better, and that's a really sad thing to say.