These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dude, Not Funny!: Several reviewers noted that several of the movie's claims (including the suggestion that Lennon and Harrison were murdered by the British government, that Lennon's political activism was just a cynical attempt at convincing the government he was 'crazy') were not in very good taste.
Moral Event Horizon: John, George, and Ringo arguably crossed this when they take Faul to India to try and transfer the real Paul's soul into Faul's body, doing so will cause Faul's soul to cease to exist. This doesn't work, luckily.
Wangst: John, seriously? We know Paul was your friend, but your quest to include references to his death in everything you do from that point on starts to look a bit obsessive. You've got to let it go.
The Woobie: William Campbell eventually (and possibly inadvertently) becomes one of these; we're clearly supposed to view him as a ruthless, imbecilic and opportunistic interloper, but when you think about it he gives up his entire life to take Paul's place, not only to save the band but also to spare the millions of people who will apparently commit suicide upon hearing of Paul's death, only to be constantly bombarded with mean-spirited digs and references to how he's not the real Paul and how the real Paul was so much better. You can't help but feel a bit sorry for him.