The Blackfish is Dead
Some stuff happened between Jaime and Brienne...don't care. The Blackfish is dead and he was an awesome character; in the books he's still at large, so I'm guessing this means he doesn't do much else there either. The scene between Edmure and Jaime was pretty damn good though; and they kept the line about throwing his baby into the castle via catapult, which I loved.
Overall a good setup episode for the upcoming fights, next week is big action! Plus I totally expect a major character's death or two. Rickon is probably toast, literally, at the least.
One thing I want to point out. I don't necessarily agree that just because they die in the show means they don't play an important role in the books.
If this was true, leaving Lady Stoneheart out of the show would be a rather large character to suggest she's not important to the books (why would GRRM bring someone back to life if they're not important? Beric was brought back to bring back Lady Stoneheart).
I think that they may kill or exclude characters in the show for one of three reasons.
1. Simply due to trying to translate a written story into a filmed story. Certain events/characters may not be easily translated into a filmed story. The event may be too expensive to film, or the event may be considered too difficult to film in general.
2. Vagaries of casting a television show. In a book, a character shows up because you write it into the story (they do what the author tells them to do). In television/movies, you have the politics of casting and scheduling issues. Or, do we really want to cast a dozen more actors/actresses to fill out a story already brimming with 2-3 dozen character (the only people who remembered and recognized Edmure Tully when they brought him out again on the show were the book readers, everyone else on the show was "who the hell is that?").
3. Excluding an event or character because another character or event will not occur or has not occurred. For example with the Blackfish, I'd bet that because there is no Lady Stoneheart there may not be a need for the Blackfish to stay alive for some other event.
Frankly I am 100% surprised we saw Sam at all this season and that they are not killing him off with some absurd nonsense. The show is definitely paring down the story to tell the Jon story and the Dany story, with the side event of Cersei drilling holes in her already sinking ship.
I think we are jumping to conclusions when we assume anyone that's being excluded from the TV show is now completely inconsequential to the story(or that the exclusion means they die anyway).
I'd be willing to put a decent amount of money on the Jon and Dany story following very closely what will happen in the books. It's a lot like a roast beef sandwich and swiss, its still a roast beef sandwich and swiss if all you put on it is roast beef and swiss cheese, but if you add some mustard and horseradish, some tomato and lettuce, maybe some bacon, you still have a roast beef and swiss sandwich but its got a lot more flavors going on(Aegon/Jon Connington, Lady Stoneheart for example are the mustard and horseradish).