I get extra viewing space with a kinda exotic resolution (2560 x 720 windowed). It's like having 2 displays in one, with a great view of the arena and enough side space for non-combat UI elements. I may post screenshots comparing resolutions when I go back to the game. Unfortunately, you can't do that trick vertically: using 1080 x 1080 to get to see more things behind and in front of you just clips the sides, giving you less horizontal space.

Tilting the camera down so your character stays more centralized onscreen helps a little. We could ask for a top-down view, but it would end like the image in this Zelda article