This really shouldn’t surprise anyone. I know some fans were clinging to the possibility, but I think Daisy Ridley just shot that prospect down. I think Star Wars: Episode VII is going to be so different from the Expanded Universe those fans loved, if her name was Jaina, it would have been so drastically different from the character those fans loved, it would have been pointless. It wouldn’t have pleased anyone, just confused a lot of situations.
I would say that settles that. I am not going to consider the potential Daisy Ridley is playing Jaina until something official comes out saying otherwise.