My kid has dual ps4 and I rarely cod with them mainly due to fact I just don't like controllers. I never really have. It turns out keyboard and mice actually already work on a PS4 but 99% of games have them disabled within the game because it is felt an unfair advantage as the mouse can aim with more precision.. There is one adapter widely available to covert the key/mouse signal to a controller input.
Do you think using a converter like that is cheating?
It seems to me especially if a game is cross platform, the console ability to use a mouse should be enabled.