She's not worthless, certainly. In fact, I'd argue that her new value as weakest companion is actually a good thing. With most companions now you could AFK in the middle of a mob, get married, have 3 kids, cheat on your spouse, get divorced, and die broke and alone in a gutter, and as long as you have your companion set to heal, your character will never die.
Kind of nice to have a companion that requires you to use some conscious brain activity to play through the game.