*L* Well, let's just see where the story takes us. If Wren's erroneous beliefs about Chall's magic becomes something important, than I'm sure it'll be a point of interest. As will all of the other things you've mentioned. It's never a bad thing to have an undercurrent of misunderstanding to make a connection fractious and fraught with drama. 

Take your time with the response. I think I'll have time tomorrow, so I may even be able to respond. Which is always nice. :)