It seems like lots of people didn't like that Ren revealed himself so early, but personally I loved it more than anything. That made it absolutely clear that he is not a Vader, at least not yet. If he was as good as Vader, no way the climax would have worked. It also makes the ending work. We have a dark master and an apprentice, and them a good master and an apprentice, with both apprentices still being imperfect. It sets up a good foundation to where the next movie should go.
Yeah, it was made clear that he is not Sith, therefore, he shouldn't be very scary right now.