On assist she should not be able to proc foresight off of her basic attack. I just played a game where she never dropped foresight the entire match because of assists and phasma leader skill, even...
By the way, I'm not sure that it is necessary to remove her foresight, because as far as I know, she grew up in the trash. She had a lot to fight for her life and the foresight developed her in natural way. In some ways it remainder me of Bruce Lee's childhood, but it is not B.L. She is sensitive to force, but she is not a superman, she survives thanks to foresight and possible number of strokes, including critical.