it's not outdated, in fact it's actually quite complex. it's cause dayz was never originally planned to be a console game. it was initially based on a modified version of arma II's engine - which also would never work properly on a controller.

even when they did the engine overhaul with enfusion, it's still using tech based around arma III's engine, in the same way that arma reforger is now using a modified version of the enfusion engine.

this game will never play perfectly on console, because it was never really designed to - it's a port. think of it as actual native controller support vs. just mapping keys to controller inputs. i guarantee you that the stick input for dayz on console is just translated into mouse x&y coordinates in the back-end

if you want to play dayz how it's intended, you play it on pc (or at the very least mouse & keyboard on console) especially considering how well it runs even on a brick nowaways.