One of the greatest misteps of the New Fifty Two was the bizarre idea to cut Joker's face off. Ultra-violence was a popular mainstay of 00's superhero comics, but the early 2010's seemed to be when that trend slowly lost steam.
It was a classic examples of an obviously bad idea that was quickly discarded and forgotten. What's unclear to me however, was whose idea was Joker getting his face cut off in the first place? Scott Snyder is an obvious contender because he wrote the core issues of Death of the Family and his horror background, but it could easily be editorial as well. I might be going on a limb here, but I think it's entirely possible that it was Tony S. Daniel's idea, due to the fact that Joker's face was cut off in his first issue of Detective.