Really interesting that they ousted both Sansa and Arya as Starks. I think the Arya ousting is just a minor deviation, as I imagine she and the Hound turn back now that her Aunt is dead and she still ends up across the narrow sea.
However, Sansa being ousted is HUGE. At the end of ADWD she is still Alayne (sp?). Tonight her character grew some huge balls and started playing with the big boys. She's being smart and using her Stark status to get some protection from the Vale, but she also is clearly starting to wrap Peter around her little finger with her 'black dress'.
The Missandei and Grey Worm thing is just....weird. In the books Grey Worm mentions that unsullied sometimes seek out women basically to cuddle and for companionship, even though they can't do the deed and have no sex drive. I guess this is something like that. I also think they threw this in to have SOMETHING else to focus on while GRRM has Dany sitting on her ass in Meereen for a couple of books.
WTF was that beetle monologue about? Was there some symbolism/metaphor that I missed? Seemed like they needed a filler last minute and remembered that Dinklage is awesome at monologues. I was really hoping they would talk about Tysha. I will be very disappointed if they don't when Jaime springs Tyrion later. (Maybe it won't even be Jaime?)
That fight scene.....ugh. So hard to watch. Oberyn is one of my favorite characters; it was hard enough to read his death, and it was even harder to watch it. Pedro Pascal and HBO did a truly fantastic job with the character. My only complaint was how overtly sexual they made him. Similar to the Loras/Renly thing. Oberyn was definitely promiscuously bisexual and Loras/Renly were lovers in the books too, but it was all behind the scenes, implications, etc. Which I think make for a stronger story/characters than the heavy-handedness we saw with the show. Just my $0.02
Back to the fight....Oberyn's amazing character combined with the stakes of the combat and the horrifying/gruesome death itself all combined to make that the hardest/most gruesom death scene I've ever watched. I was physically nauseous for almost 30 minutes afterwards.......