There's nothing wrong with having a magical girl-type hero, except this girl is clearly more of Western archetypes in terms of powersets and fighting than Eastern ones. It's basically another girl who is supposed to be deemed a loser and invisible who is able to really beat people up and use combat magic as a counter.
I mean, come on. Can't any media get what people who are really outsiders are really like? Maybe I'm jaded, but I'm tired of this "I'm a loner, but I kick butt" archetype. I want to see loners who aren't competent and do need others, but still scrape by without them.