Okay, there was a pretty big plot hole in that cliffhanger and 10-year jump. If that explosion destroyed the morgue... and Ravi's cure-making equipment was in the morgue, and he didn't have time to make more than one dose... then why didn't the explosion destroy the cure?
Also, there were far too many fakeout deaths -- first Peyton, then Major, then Liv. It got repetitive. And if they were going to pin the finale on Liv and Major living in hiding for 10 years, they could've put a bit of effort into explaining why they did so. I guess it was so they could live in peace without being hounded by the media and government and fanatics and such, but that was a little vague.
And this finale really underlined how peripheral Liv became to her own show these past couple of seasons. She didn't really accomplish much in the finale. Don E. cheated her out of her final confrontation with Blaine, because Peyton set him off. Peyton helped the kids escape. Ravi and Major defeated Enzo. And Dolly just vanished into the woodwork. Liv didn't get to beat any of the big bads; she just reacted and cried at fake deaths and sort of hovered around until a happy ending was handed to her. What a disappointing ending.