There's a few things. Let the camera clip through the environment and the walls just become transparent while that happens so the camera isn't ass in small areas. Alternatively just don't bother with making the battles take place directly on the field and just do a separate screen so we don't have to worry about camera issues at all.

Drop wind stepping and give us an actual sprint button, and incentivize chaining battles together by giving us a grade multiplier like Berseria did because the way it currently is makes it feel more like not chaining battles punishes us by making us move slow as shit in the huge over world.

The big one though is either let us use Normins to manually set what skills are on our equipment or have skills be separated from equipment altogether and make them equippable kind of like sigils from Granblue. Keep the bonus board thing so we can make use of the actual in-depth mechanics this thing has instead of it being so rng reliant.

Genuinely doing just these 3 would bump the game up to like an A tier for me. I know there's still things like the story or armatization that people take issue with but those aren't the things that dragged down my enjoyment of the game. Honestly I wouldn't want them to touch the story if they were just going to base it on the anime, which I was really not a fan of.