Ultrons plan was to take BW and lock her in a cage. He could have killed her, which was his mission, but instead he thought... "Naw, I'm gonna throw her in a cage and get back to her later, and then kill her... or something." His plan was to build a machine that could levitate an entire city, that he would then drop on earth from way up high. I'm sorry, put that is poor ****ing writing. I loved Ultron, I think James Spader gave him life, but he was a stupid villain, wether it was the cut or Whedons poor skills as a director, I don't know.
The film was pretty stupid, the dialogue was corny and nobody really had anything to do. I hope the longer cut makes more sense. Age of Ultron... More like Moment of Ultron. I thought he was going to enslave the world or something, but no, he tries to hack the missiles program, but finds out it's way easier to build a device that can float an entire city, which he is then gonna drop on Earth, cause that'll teach them.
I know you all love the film, and I'm a heretic for saying anything bad about it. It's fine if it s good entertainment, but with a budget like that, the least thing they can do, is make the story make sense.