Accuracy shouldn't be an issue at all in 4 man content. It absolutely should be a requirement in 8 man content though. I'd say that if your healer is required to dps in raids then it is not a waste to meld acc into your gear. DPS and tanks might find themselves in the position where they're going to have to meld acc into some slots as well. As opposed to buffing cleric stance which would be game breaking, just easing the acc requirements in 4 man content would ease most of the complaints about this. I know I don't like to see Holy miss 4/5 mobs when I'm trying to not only speed up the run, but stun lock the mobs making tank survival easier to manage.