We don't know what Diana thinks today.
Prefer to give her the benefit of the doubt.
I don't know either. But having grown up around Hubbard and in the Sea Org her whole life, I would imagine she doesn't think that much about anything. I would assume her cognitive powers are mainly dedicated not to thinking–but instead to duplicating.
And i would also assume that she is terrified of being fair gamed if she ever left. She would know what kind of savagery the cult is capable of.
However, I wish her the best and hope she tunnels out at some point and tastes freedom.
It would be cool if there were CROWDFUNDING websites that offered hopelessly trapped Sea Org members a "Witness Protection Program" where they can escape, tell what they know and have a safe place to live with a new ID.