Did you learn how to fly yet? ;) I think at that point, Arthur learns how to be less Arthur himself. I don't think things between him and Fenchurch would've worked out, had he been the same person he was at the beginning of the books.

Then again, the last book really depressed me - I can't imagine having my Fenchurch being ripped away from me...

That part was probably worse than the ending for me.

I hope you are doing well.