I mean it is about IX as she was asked a question about IX but your right she is talking about all of the new trilogy. but it doesn't change that she's right and there is no source material they could have used as the actors wanted out or died. as far as other media goes they can use post return EU stuff as source material but that's just not an option for the live action movies.
I mean i guess they could have recast all of the original characters and then taken from the EU but the fan base would have hated that and it would have likely ended the same way with poor movies.