You know, after a few months of finally digesting the film, along with having seen the film multiple times, as much as I enjoyed it and thought it was great, here are some of the things that I had some issues with for the film:
1. I thought the gun fight between Loki's mercenaries and Fury/SHIELD Agents in the hellcarrier were pretty tame. I mean, maybe this is just a personal preference of mine, but I had been hoping for something a bit more exciting and better choreographed/chaotic in the same sense of the gun fights you'd see in films such as Star Trek or even any Michael Bay Film, but without the cheesy dialogue.
2. I would have loved to have seen the group fight an onslaught of Aliens TOGETHER instead of just seeing them taking on the enemy by having some Avengers here and there. I mean I thought it was kind of funny to think that as soon as we finally get the group united, we cut to them splitting up again to take on the threat in different areas. While that made totally sense given what they had to do, I would have enjoyed seeing them take on Loki and a large group of aliens TOGETHER/IN THE SAME AREA before they scattered to their respective areas.
3. While it's naturally assumed and common sense that many people died during the Invasion, it wouldn't have hurt to actually see a body count to further emphasize on that. I can't remember ever seeing any civilian or cop get killed or shot in the invasion. If there's one thing that Michael Bay is good at is that he knows how to create scenes where you see the casualties caused by the antagonistic group, and I wish we could have seen something similar to that here.