That's true, it makes a vague air of menace and what might happen next, still though actually explaining what's happening and why it's happening opens up a lore for this 'series'. I mean damn, I'm already a fan of Elise, and I like how the wife and mother of the possessed dude were not dumb broads and went back to the house like idiots, it's only because that evil old fukked up spirit sent them a fake text when the takeover plan went down. They actually used common sense instead of the ol cliche where women aren't just weak they're dumber than a door-nail.
Speaking of texting though, how the fukk does a dude who was already old in like 1950s-60s, come back as a spirit in current time and learn how to use a cellphone? Most older people have enough trouble as it is, couldn't the wife figure out that since her husband knew how to but suddenly didn't know how to explain that, that's not really him?
Plot hole.