Grand epic battles vs. Smaller melees (spoilers)
The Wakanda battle in Infinity war was great, but I have to say I enjoy the smaller action pieces with just a handful or even just two people involved. I didn't need to see a grand battle again.
There is a satisfaction in seeing characters go one on one in a drawn out fight to the finish rather than seeing several disjointed skirmishes within a bigger battle. I was disappointed how few real fight action sequences were in this, other than the ones at the climax.