Because this is going around and also because i feel that is immensely unfair to the actress who played Ellie that people keep calling her an Ellen Page Knockoff. From what i understand of Mocap especially with the face you want your actors to have a similar face ot the the charecters you're animating. This is entirely because Mocap can involve a lot of cleanup work and a similar face likely will make it so your rigged face model doesn't just suddenly invert on itself.
Why i think this happened is pretty simple both actresses have similar faces. Ellen Page has dark Hair, Ellie has dark hair, Ashley Johnson meanwhile has blond hair.