Agreed.
Euron and Coldhands are two of the coolest, most interesting characters in the books. They have had, what, three scenes total this season so far? But by all means, please go ahead and blow the budget on Daeny doing touching nothing in some stupid city and some stupid prairie that no one cares about, and all the CGI, extras, etc. that entails.
Hell, episode 9 might just be an entire hour of her giving a speech on the back of a dragon while everyone else on screen stupidly looks on in awe like they are watching Charlie Brown's mother or something.
That is my biggest gripe with the show. I get that they have to stay somewhat true to the source material and the Daeny in Mereen / Dothraki camp angle is pure awfulness, but they spend so much time on it to the detriment of all the legitimately awesome other parts of the story.
It also feels like they are rushing everything toward a conclusion. On some level, I like them speeding up GRRM's pace and this season has, except for last night's clunker, been probably my favorite, but on the other hand I love the details and the slow set-up of plots over years (HODOR!).
With the news that the next two seasons are supposed to be abbreviated, I'm not sure what the rush is, unless the showrunners are sick of waiting on George R. R. Martin and / or the whole project and just want to wrap it up for good.