I have the same problem with the characterizations by even the best authors. Maybe that is one of the reasons I love this so much... it is easy for me to accept them being slightly off since it moved away from canon so early on. It isn't hard for me to believe that that much time apart would change them the way it has.
The easiness is what I love too! And the feeling that they are just inevitable. So many lines in the fic that blow me away every time I read it.
Though there are two lines in the fic that have always driven me crazy and I would just love to hear what the author has to say about them. The line about Justin being the boy who lived and the one about Brian making Ben bleed.
Thanks for reading and sharing! This has been fun :)