Now, Now there is nothing wrong with the last episode of ENT the "Terra Prime", "Demons" story line ends the show on a positive note.
I don't know about that. However, the finale is easily disposable.
Let me add my endorsement for season 4. The universe that they explore feels to be the right size. The show isn't struggling to expand upon the themes of the 24th century series AND be a prequel at the same time. And the Federation is finally given a raison d'Ítre.