No we are not in Disney World. An happy end is impossible here. I think kill Vanessa is a best way to finish PD, but I would prefer to see Vanessa fight Dracula and died after have killed Dracula.

Some people don’t like this bottle episode
(not about the acting) because season 3 has only 9 episodes and they would prefer
to see others character and because we don’t learn what we already know (but
that Vanessa doesn’t know). Nearly 1 hour to know that his name is Dracula. 10
minutes would be enought. I think they…

I don't think 9 ep are enought to kill Lily, Dracula, Dorian and Dr Jekyll. So, I suppose it will have a season 4 :-)
So, The Devil and Dracula want Vanessa but live to possess her.