So imo, this game is one that would benefit tremendously from mouse and keyboard on console.
In general, I think most games should get mouse and keyboard support. The general attitude is that you shouldn't hold a player base back by disabling people on playing from the superior peripheral, just like you wouldn't stop a fighting game from being played on an arcade stick. This game strikes me as one badly in need of mouse and keyboard though. Survivors don't seem to be adversely affected by controllers. At least I've yet to see any tactics that couldn't be implemented on controller and have heard many survivor mains say they prefer controller. However, killers are much easier to juke on console and you have two killers (nurse and to a significantly lesser extent huntress) that stand to benefit from the inclusion of this option. I mean, it would be nice to encounter a nurse on PS4 and feel like I couldn't treat her with less respect than I would freddy. But as it stands, on console nurse is pretty much a throw away character. I've yet to see a worthwhile nurse player on platform.
So my mentality is this. Survivors can play as well as they can on console without keyboard. Killers are balanced around keyboard so the ability they gain from getting access to it is something they were always meant to have. This means that we don't even run into the crybaby retort of "Oh, it's not fair to me because this person has a better controller they win" that you usually run into with these things. Behavior, pleesh gib