The Ending
Personally, I was positively thrilled by the ending and found it very true to the story and the characters. It was my favourite part of this film that imo celebrates love, life, personal freedom and acceptance. The question of the people left behind is of course very important, but I believe it was delt with very rationally and honestly. I am of course in no way saying that my view is the only legitimate one, but I should hope it's far from unique. Also important, it's one film and one particular story, so don't make too much of a fuss over it. I'm just glad these issues are being raised and (again, rationally) discussed.
"The boxed stuff doesn't get better with age." (Supernatural)