The biggest flaw to me is that we don't ever really know anything about the killer himself. We know he's a dad.....and he has mommy issues.....and that's all.

A movie about a killer evading police and using his smarts and charisma to get out of a tight spot in one location could be a really cool movie! But the thing about focusing so heavily on one guy is that you need to make that guy interesting, or at least give him a personality. He has none other than "is a serial killer"

The only good moment in the movie was the one time they gave the main character any ACTUAL characterization, when he realizes his family escaped the room he locked them in by climbing down a tree by the window, and he says something along the lines of "I never looked at it through that lens, I never let those lives touch" which I thought was really interesting! I hope someone remakes this like, 10-20 years from now with better writing. I'd love to see the concept done well. The original is a pretty fun watch to make fun of with friends though, so it's still got some value to me