Saw Thor 3 over the weekend and it was pretty good. I think if there weren't so many other great Marvel movies, I would have liked this even more. The story and visuals were great, but I agree that it didn't really feel like a "Thor" movie to me. The past two movies seemed more serious or somber to me, whereas this was a lot of joking and physical comedy with Thor and Hulk. I laughed a lot, but it does have more of a Guardians feel to it. Given some of the deaths involved, I would not have expected Thor to be goofing around and cracking jokes. I would have liked more set up on what happened between Loki and Odin as well. If Loki just cast a spell on him that led to his demise, it seems like should have been more than a light-hearted footnote. I wasn't overly impressed with Tessa Thompson as Valkyrie either, but Kate Blanchett was excellent.
*SPOILER ALERT* - Did anyone else catch Loki eyeing up the cosmic cube? Guessing he grabbed it off screen, which was maybe for the best given what happens to Asgard. And the immense ship at the end had to be Thanos, right?