Generally speaking, she'd be quite a bit weaker than someone who's a true flying brick. She could at best break stone or dent regular steel. She could also take a few hits, but she'd not have the pain tolerance of someone that's also that archetype, making her "someone with decent powers that has to rely more on techniques then brute strength to win her fights". As for the Cartridges, well, at the moment she's rather clumsy with them and they should generally act as "one shots" rather than a continuous state at the moment. 

As for the room thing, it was her pushing someone out of the way that convinced someone to give her the powers. I was hoping to gradually build up on who gave her the powers in the first place, eheh. If that's not good enough, I'll change more, okay?