I think Roger Smith has a good point with the guns here:
Most of her weapons are so fantastical, they are to the point where they don't feel like real guns at all.
I do understand the situation here, and it's something Sakurai can easily strike a balance with Bayonetta's main appeal while avoiding noticeable nudity if he wanted her in the game, there are multiple ways of getting through the situation. He would be extremely aware of the situation at hand.
It's not the only quality, with her large library of moves that come in the form of her hair, witch time, torture attacks, her personality, the way she does combat and her fantasy-like guns make her one of the most unique potential additions Sakurai could consider for DLC. I don't know how many times I have to reiterate this to convince you that she fits in the game.