I’m pretty much working on the assumption that Xho has to do *something* sooner or later, to justify not only his own existence, but the Summer Islands as a whole. Why’s he in exile? Who’s running the Islands now? Are there or were there political or economic ties between the Islands and Westeros, or did Xho just pick a random kingdom to live in exile? At this point, retconning that the Summer Isles are just a colony of, say, one of the Free Cities, would not change a thing they’ve been left so un-detailed … except for, as you say, the rather troubling ‘hyper-sexual black people’ theme.