It's more the "sudden" style of the ending that I disliked. It was just over, no shown consequences, no epilogue. Just either Amelia goes poof or Megan wins, "The End". You left what happened to the other characters completely unanswered, the end screen is a black screen with white words and being able to access the gallery.
It just feels so... blank. There's no conclusion, no resolution. It's just a let down. Your new game doesn't seem to have anything to do with the same universe, so again, I just feel after 2 games of story that abrupt ending is extremely lacking in substance. There should be some kind of epilogue, that's what I feel.