It was bound to happen really. The attention and creativity that goes into a book like GoT just cannot easily replicated with a couple of medicore TV writers.
The current series so far seems very dumbbed down. I really hope we see some clever stuff in the last 2 episodes.
I don't know, feels a bit harsh to be calling the same writers that delivered so much good stuff, including stuff nothing to do with the books, early on as mediocre. The dialog has, by and large, been up there. Loved the ep2 stuff around the fire and the Jaime/Brienne bits.
Where they seem to have mistepped is on some of the larger overall story points. Not what's happened but
how and that's more a failure of execution than script imo. No problem with the NK getting done in 1 episode - it was basically two episodes in length...
Ep3, the dead finally get in over the walls - story wise no issue, execution wise... well, enough's been said. Could be they have made a mistake in the design of the humungous set with the ditch too close to the walls and had to make do? Who knows, but it was a mistake either way.
Dragon getting hit and killed, again story wise no issue. Two dragons would be OP for "the good guys". Execution wise, while not as jarring as the ep3 tactics could have been handled a little better.
Jon sending ghost off and has his fairwell - no problem story wise, execution...
I think maybe they're hitting the limits of what you can achieve in a short time scale with a limited budget on TV.
Still think the majority of this season, despite these misteps has been fine. Folk are always giving out about GoT during the season and yet always love it when the season is over. We'll see - I hope the pull off the landing.