Super Mario Brothers could be played on a toaster motherboard. I’m sure WoW can port over to XBox, PS and Apple/Google Playstore.
This works for low level play, but when your doing upper end content that is very fast pace and you have literal split second decisions. Then the controller set up will fall flat as it will be slower than keyboard and mouse in terms of inputs speeds and movement.
Problem isn’t so much the classes and the gameplay, it’s more that with WoW you wouldn’t really be able to have console players and PC players on the same servers. They would have to pull a ESO and separate the playerbase.