Demons/TP was a solid season finale, but it doesn't offer any kind of closure for the characters, really. And TATV... TATV completely disregards everything that happened in Season 4, ignores every single bit of character development and feels so much out of place, it's jarring.
VOY's "Endgame" falls short too. After seven years of rooting for the heroes to return home, you don't actually get to see them do it.