Definitely wasted the character, throwing away any personality just to serve a shoddy helmet reveal for a "twist" that's already rather played out. I've seen people satisfied with it because of Antonia linking back to Natasha personally which I understand, but I don't think Antonia was sufficiently built up on her own right, just as a prop for the development of other characters. She was a pawn to Natasha just as she became a pawn as Taskmaster so the whole reveal left very little impact on me as a viewer and it very much was not worth the cost of making her a mindless robo-slave.
More subjective on this part but I honestly don't like the Antonia reveal because it feels like giving Natasha a shot at redemption for her darkest sin. Like I said, Taskmaster just feels like a prop for others and not his own character.
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I request affiliated many pipes. Been a bad girl, I know I am. And I'm so hot, I need a fan. I don't want a boy, I need a man.