... Thor ... - all great.
...Thor 2 ... - not so much.
While I kinda see the point in your discussion, you totally got this opposite, and perhaps you should rewatch Thor 1, actually no, it's impossible to have a positive opinion about that movie even on the first watch.
Sorry for the derailing, just got back from the cinema, well, I do see some wasted potential here and there, but this movie was solid.
The only thing that plainly felt wrong were the nightmare sections, which had very weird cut/editing and too long screen time, but then we had the hulk buster thing that was awesome, so yeah.
I felt the movie clicked for most the viewers too, all the jokes responded with the room laughing; liked the Ultron/british humor thing, but that kind of villain gets old fast (it felt forced already with Loki in the first Avengers) but overall people seemed more concerned about his lips moving.
I'm not familiar with The Vision character, Scarlet Witch and Quicksilver, but I guess I could not ask more than a little plain introduction for them, perhaps making a better job on them could've lead to focus less on the main plot.
Anyway I find it super funny how both the Marvel and the DC movies universe are with the "Super heroes are bad for the planet" thing, but that's something that puts his roots in Iron Man 1.