1. The pacing
I know that it's been discussed to death already, but it really is the worst part about this season. There's a long list of issues that easily could have been fixed if the season had only been 3 episodes longer. Here's a short list of things that could have been changed for the better with an additional 3 hours or so:
- Yara's Iron Fleet wouldn't need to be completely crushed in a matter of minutes right the feck out of nowhere.
- Olenna Tyrell could have been given more screen-time. Not only because she is a great character, but also give her death more impact.
- Ravens and armies wouldn't need to move at an impossibly high pace(some nerds did the math, and it's beyond ridiculous).
- Bronn's rescue of Jamie Lannister could have been done smarter(boy, that was stupid).
- Thoros of Myr, a legend in the GoT universe, could have been fleshed out so much more(no pun intended) before being killed off.
- The same is true of Gendry(though he's not a legend and he's still alive).
- Littlefinger vs the Starks could have been done so much better(I'll get back to this further down).
- Episode 6, which was supposed to be the most epic episode of the season, could have been done smarter(waiting for the ice to freeze, really?!). Not to mention Daenarys last second rescue..
- The Tyrion character wouldn't suffer this much. The lack of time and depth makes him look uncharacteristically stupid and out of control.
2. Lack of grit
There is a common GoT myth that main characters often get killed off. This is of course nonsense. Among the 15 most important characters that we follow closely and are supposed to sympathize with, only 3 have actually died(Ned, Cat and Robb) so far. The last time this happened was in season 3. There is of course nothing wrong with that, but if there ever was a season to have at least one main character die, if would have been this season. With all the madness going on, it's almost a miracle that characters like The Hound, Davos, Jorah, Sam and Theon all are seemingly safe. Even side-characters like Tormund and Bronn have plot armor now! I love both characters, but come on... A part of GoT's greatness lies in its grit. Unfortunately, a lot of it seems to be gone. Wisecrack made a good video about this:
3. Littlefinger vs the Starks
I already mentioned it above, but this was done so poorly that it deserves its own point. I'm fine with Littlefinger losing, but not like this. Was he given even a single small "win" while residing in Winterfell? Littlefinger is one of the greatest villians in the GoT universe, right up there with Tywin. He's possibly the best schemer of them all, yet his stay in Winterfell is only failure followed by failure. The writers should have let him at least have a couple of punches before being knocked out. Overall, they completely assassinated this great character.
The worst part is that while the pacing is partly to blame, bad writing is the main culprit here. Rip Littlefinger. Chaos is indeed a ladder.