I THINK I know what @JtheDreamer is saying, I think he's talking about it more from a technical standpoint as to how the actual combat was filmed. A lot of quick cuts. Now, I absolutely have to watch it again to process it because on first viewing it was just complete sensory overload and everything was happening so fast and I was so gleefully caught up in seeing Cap wooping Thanos' ass with Mjolnir but from what I can recall there were a lot of quick edits and maybe not enough in camera fight choreography akin to...maybe some of Game of Thrones' best battle sequences. Which is what think he and some others are talking about when they say these big war scenes aren't the Russos' thing.