"Blair Witch" does stumble slightly as a sequel when it comes to adding something new while building on the original. The downsides of the film, for me at least, include too many cheap attempts at having people jump into the camera and horrible non-subtle noises in the woods at night, a weird Bermuda Triangle style effect about the woods, an odd infection that one of the campers suffer from, and almost the same story beats from the original "The Blair Witch". Finally, this film ruins what the original did so well, it shows too much.
The ending of "Blair Witch" leaves the question - what happens next? The actual ending of this film isn't as ambiguous as "The Blair Witch Project", but I can't help but wonder if there will be an attempt to make yet another sequel? How would they expand the existing story and what would they add to the established mythology? Will horror fans remember this film as fondly as the original?
Overall, I enjoyed the movie even though it felt more like a remake than a sequel. There were moments that I laughed out loud at the characters, and parts that I felt engaged and had no idea what was going to happen next. I wished it had been a bit more original but at least I wasn't completely disappointed.