Plot: The movie honestly follows the manga close enough. The key points are there, yes with some changes but the heart is there. Are all the changes they made truly needed is the key word. Its hard to condense this GIANT series into 1 movie but they do a great job.

Visuals: So here's the thing, mediums matter. Manga to Anime to Live Action, its all interpretations of what we see. Alita's body isnt human but close, thats a key point. Such a key point it need to be in the movie... but when ppl dont get it, it looks weird to them, uncanny.