AoU was definitely not one of my top Marvel movies.
Age of Ultron could have definitely been tighter. I only saw it once, but I remember leaving the theater feeling that with a few changes here and there, the whole story could have been more compelling. In all honesty, it's my least favorite Marvel movie so far.
I have decent hopes for Ant Man, only because I enjoy stand alone stories more. Though I'm sad to hear that Edgar Wright left the project because Marvel was being too controlling, which incidentally ties in to why I tend to support creator controlled comics over Marvel's and DC's offerings.