Ultimately, Cawthon's main goal wasn't to make it gory, he wanted to tell a story, with the kill count being second on his priority list, as he still wanted the film to be accessible to a wider audience, and a mature rating would lock a lot of people out of the experience, I'm still happy with how the movie turned out. Besides, with the success of the first movie, maybe they'll make the sequel more gory (the sequel has been confirmed to be in the works)