I feel like the overall plot points/outline that George RR handed D&D (i.e. Jon killing Dany, Bran becoming king, Jamie dying with Cersei, etc.) made sense and had plenty of foreshadowing for the last twenty three years in the books, but the show's execution was poor. If you read the interviews it's pretty clear that the showrunners burned the budget on battle sequences and couldn't afford to extend the season and flesh out the storylines with character development. From that standpoint it was pretty poorly done but I can live with it. If George ever actually finishes the books I think there's a very good chance it's extremely well done and the ending makes much more sense even with the same overall plot points. Let's just hope George lives to tell the tale because he's still got a couple books to finish.
I do have to say that I can't figure out Arya's storyline and where that came from. All of a sudden she's Ragnar Lodbrok? Odd. I also have a hard time believing Grey Worm didn't execute Jon immediately considering his willingness to kill everyone opposing Dany. And none of the other Westerosi lords apparently have any interest in being independent except the North? Yara/Asha has expressed her desire for the Iron Islands to be considered independent before so that would have been nice to see, but they shortened the season and had to make every scene get to the point and the season suffered from it.
The wait continues for TWoW and ADoS.