This movie seems to deteriorate in my mind every time I think back on it. The ending that I described as "a very strong finish" is actually unearned and doesn't make sense under the mildest scrutiny. So I'm not left with much. Everyone basically says the same thing — The Discovery had a pretty great idea and then basically did nothing with it.
John Hodgman likes to say "specificity is the soul of narrative." Well, that kind of explains why this doesn't work. We never even get to find out specifically what "the discovery" was — only that the evidence was overwhelming. Seems unlikely that could be true when the scientists seem to barely understand what they discovered. Why are people eager to commit suicide if they don't know where they're going?
The movie would have us believe that an ideal afterlife is one where you get to fix your mistakes. There is again a lack of specificity here, but it seems like you live the same life repeatedly until you make a few key correct decisions. Like it's some kind of long performance that you need to get right. Maybe it's just me, but that sounds horrible and dumb. If you believe in reincarnation for the purpose of spiritual progress, wouldn't you want to live a few different types of lives? On the afterlife cam, we only see people making correct decisions or reversing key mistakes. Wouldn't it make more sense just to review your life and identify the mistakes? Why do you need live a new life in which you physically reverse your regrets? You already know what you'd do differently — why go through the motions in a pointless illusion?
Furthermore, the life/afterlife that we see Jason Segel living does not seem to resemble the afterlife cam, where reversing regrets is the only thing people seem to be doing.
The marketing described this as a love story, but the movie barely establishes an emotional connection between those characters, let alone some kind of deep spiritual connection that can transcend time. It just does not happen. There are no scenes that really do much of anything to get them there. It's like half of the script was lost, but they decided to go forward with production anyway.