"How do you explain the time differences? How is it that he can be in you, but the show was not in existence til later? Also, how do people from a future that doesn't exist yet exist here, or a future that isn't finished? Or a currently on going show? How does that work? How can someone remember what hasn't happened, yet? Has any research been done on this?" Fred was asking too many questions, but she wanted to know, to understand.
Parker couldn't expect Fred to be all that focused without asking more questions, without needing more answers. And, she was being nice in not asking for more information, or to speak to Wesley. She knew it could be possible seeing as she "spoke" to Adam/He-Man and not Claudia. She knew it could happen, but then it maybe didn't work that way with everyone.
"Elsa's going to be trouble." Fred had already decided this. It wasn't that she expected Elsa to be mean, but the woman was very controlled in her apartment, and in her dealings - if the laptops were any indication. It was hard for Fred to see Elsa as anything but complicated and troublesome.