Little bit, yeah.
To be fair, this season hasn't been quite up to standards so far, but it's been exaggerated a lot by how much. Moreover, I've not read the books, but everyone who has basically says that the books that it's based on is a lot weaker than the first ones as well, for pretty much the same reasons all of you mentioned - the steam has run out of most plotlines, there's a lot of characters just moving around or killing time, with things being set up for the grand conclusion presumably. As such, I don't understand the extreme criticism of the showwriters.
Also, the Wall-plot has never been better and truly brilliant this season, Hardhome was an outstanding episode for example.
Concerning Shireen, I don't know book-Stannis, but for me his decision last episode has absolutely not been out of character for him. And his father-daughter scene earlier this season was literally the opposite of pointless, it's in fact extremely important in showing how difficult making his choice was.