"Paranormal Activity: The Ghost Dimension" wasn't unwatchable and I'd say it's A LITTLE better than the fourth, but it's a study in why this franchise has become so stale.
"The Vatican Tapes" is...just...there. It transcends both 'good' and 'bad', being the reason why the term 'mediocre' exists. I feel like I've seen it before in the form of every other possession movie.