I would give the movie an 8 to an 8.5.
I think Feige and Whedon were pulling our leg because the finale was in no way better than The Avengers, and while it was good I don't think it will be hard to top.
I think what kind of disappointed me the most was how almost innocuous the suits were in the movie. They are constantly breaking apart or just not working period. Tony can't seem to stick with one. You can also barely even get a good look at them before he dumps them or break them.
The plot twists: