In-battle movement is actually useful

Pokémon Legends: Arceus’ battles were more cinematic than those in previous games, and part of what added to the chaotic nature of its fights were that you could move your character around as your Pokémon took part in the scrap. In Legends: Z-A, Game Freak is taking this a step further by integrating it into the battle mechanics. Positioning and timing are integrated into combat in ways they weren’t before, and as you run around your active Pokémon follows, setting up and avoiding attacks as they play out. So now you don’t just run around aimlessly during fights; you’re a more active participant in battles.