I really enjoyed the books up until A Dance with Dragons, which was just too dull. I don’t like book Tyrion and can’t engage with book Dany, so it was a struggle. The whole Quentyn Martell storyline just seemed pointless at that point.
Realistically, I don’t think he can finish in two books. The story has expanded and expanded and he never seems to ‘end’ a storyline. The books should have moved beyond the primary phase characters and into the secondary phase, but we’re still hearing about the Brotherhood Without Banner and the Freys.
Many of the great mysteries of the show are already out there. We know Jon gets ressurrected and Shireen burnt, we know why Hodor only says Hodor, we know R+L=J, we know Sansa takes back Winterfell with the help of Littlefinger and then causes his downfall. The details will be different, but the ‘checkbox’ stays the same.
Given his history and the background for the character, Dany ending up on the throne just seems like the ‘wrong’ sort of ending for the series - book or show. I do think they wrote season 7 and 8 together, so nothing that has been said in either one should be taken as a throwaway line.
I have a feeling that Missandei is going to die. Her and Grey Worm made their retirement plans and he miraculously survived the Long Night despite being on the front line.