Speaking of toning things down it seems like the mental powers from her first appearance are being played down. Or at least I hope they are. I didn't think they were a good fit for the character at all, and they seemed like they were created backwards due to plot mechanics.
As many people have pointed out, it was tough for the twins to be sympathetic on Avengers: Age of Ultron because they have to be really, really dumb to team up with a murderbot and attack the Avengers over stuff they didn't do. It was not well thought out. (This story could have worked, of course, but not in a movie where they have so little screen time.) I wouldn't mind seeing them lean into this, but if they can't - and they probably don't have the screen time to devote to it - it might just be better to sweep it under the rug.
I appreciate Joss Whedon trying to get Wanda and Vision into the MCU and I'm glad she didn't disappear along with Pietro, mind you. But the mind-control stuff was a bad choice in my opinion.