In the books, there is a rather complicated Wall subplot early on in ADWD involving ADWD That particular character appears to have been completely written out of the show. ADWD/Potential Future Spoilers
I reiterate that in the books Missandei is ~10 and there is no shipping between her and S5E5
Yeah, this ADWD/S5E5 is pretty "WTF" in the books as well, considering the grand scheme of things
Well, the whole S5E5 is totally new and a "WTF" to book-readers. It's heavily implied in the books that the place is like a cross between the Bermuda Triangle and an apocalyptic wasteland. Here it seems ADWD