I was a little disappointed with how easy the team's victory was, or rather, how unexplained it was. Tony just showed up and said, "Hey, I'm a fast learner" and suddenly he somehow was able to master and subvert Kang's technology. They didn't do enough to justify Tony's ability to do that -- they just asserted it.
I didn't mind it as Tony didn't do it - Ultron 5 did - and that Ultron WILL become THE Ultron as a result, which is a neat way to reconcile how Ulton came to be. Again, I think they're doing a wonderful job of re-weaving 40 years of marvel Comics continuity into a good overall story that works for the most part.