Thats a good theory. Re: Banks I dont know all of the details around where he has been and when, it just felt like that was the direction the show was hinting, which probably means it's misdirection. Daisy mentions to Mack that Banks left early probably so he could hide all the secrets before they get there, and then they are ambushed. Just seemed to fit.
I like the Andrew theory better though.
I like the Andrew theory better though.