Quote Originally Posted by Stachiko View Post
At that point she should have become a villain. We should have fought her.
That wouldn't make any sense. Her action benefits us and she is not against us, so we have no reason to fight her as a villain.

Or, if you're arguing that SE should have made her an actual villain that poses a danger to us just because of her past action that you disagree with, well, that's not how that works. They can, but they don't have to and they didn't.

And yes, time travel is always a tricky concept, so I'm in agreement in having none in the future. That said, I won't discount it appearing again either as it has been established, after all.