Yes, this is how I feel about every single Telltale Game since The Walking Dead: Season 1. After a lot of joyful hours in a setting, as dark and bitter as turkish coffee, the formula can't stand up for itself anymore.

Sure. The stories are still enjoyable, but does that justify a lacking "game" in every other aspect?
I highly doubt that.

But maybe we should start at the beginning.
You play different members of house Forrester, a smaller noble familiy risiding in the very north of Westeros. You fight for influence and survival.
Like in every other Telltale game you will make decision which determine their fates. And while the previous games allowed some freedom, or atleast made you believe it, GoT doesn't even try.
No matter which decision you make, apart from a few cosmetic changes it all turns out the same. Luckily it gets better towards the end. In a game where you concentrate on the storytelling and makes austerities everywhere else... well you see where this is going. It just doesn't work.

Now you may ask: "But what is lacking?"
And my answer would be simple: "What is not lacking!?"

Gameplay is missing completly, what was a fresh take-on in TWD, is now showing it's ugly face. Pressing W from time to time to move forward or doing tedious Quick-Time-Event, which where already boring when they saw light in the 80's with the release of Dragon's Lair, are by no means gameplay or in any way entertaining.

Now, I grant you that, this point is a matter of personal taste, but with a growing fund and a licence as big as GoT, I expected a better looking game. The comic style is charming sure and it was fitting for games like The Wolf Amongst Us.
But somehow I didn't feel the vibes in this interactive movie. Because, lets be clear, this is not a game!

Last point of what lacking in this this self advertised adevnture game: Riddles.
Every task, riddle or whatever you can do in adventure games you have to find out by yourself. But not here. Everything has just to be clicked in no particular order and the story unfolds. There is simply no challenge.
Let's make and example.
You want to get a super secret Sword of Awesome. But you have to make a jounrey as dangerous and treacherous as humanly possible p.s. Here is a map to guide you. Just click at it and you will eventually get there. See you later.

Now that my rant is over I will give you a short list of positive and negative aspects. Imagine it as a tl:dr if you like.

The Positive

+ good voice acting
+ the story stays true to the ASOIAF formula of threachery, love and war

The Average

~ plot holes (Why the fudge would someone in King's landing care about land the size of a peanut which is almost every day frozen? And a handmaiden with no skill and no political power trying to use the Queen regent or Marge the skimpy clothes? No)
~ not enough freedom in choice in a game which concentrates on that
~ no progress in graphic presentation

The Negative

- a missing game
- outdated gameplay mechanics (QTE)
- clunky controls
- no localisation

Summary & judgement
A good story wrapped into an uninspiring presentation which you still can have fun with if you ignore the obvious flaws.