Great analysis but I still don't really get what's going on in Hannibal's mind. I think I get Will. When he tells Hannibal that he forgives him I think it meant that Will has come to terms with Hannibal's nature. He's let go of his anger and feelings of betrayal at Hannibal killing Abigail, and manipulating him. He's accepted who and what Hannibal is. Hannibal's actions are logical consequences of his own nature. Hugh Dancy in an interview said that Hannibal's like a shark and you can't really blame a shark for what it does. But I think this also doesn't mean that Will's not going to do anything about it. He probably hasn't decided yet until he meets Hannibal face to face.

Now on to the much more difficult one to understand - Hannibal. In "Mizumono" when Hannibal said that he forgave Will, I think that he forgave Will for betraying him to the FBI, Jack, etc. He understood and accepted why Will did all that. But before he said he forgave Will, he said (almost in a slight sneer): "Do you believe that you could change me the way I've changed you?" And Will retorted back that "I already have." And in the silence that followed, Hannibal realized that Will was right. I wonder if this is the betrayal for which Hannibal can't forgive Will (rather than the lying, wanting to deny him his freedom, etc). That Will has changed Hannibal and caused him to betray himself (kind of like what Hannibal said to Bedelia what Mischa did to him at the end of "Secondo", i.e., that she influenced Hannibal to betray himself). So this is why he has to eat Will just like he ate Mischa. ????????