I'm all for job identity but don't think bringing stances back is the way to do it. Tanks giving up survivability to push MOAR DPS has never felt right to me and I don't want to go back to the days of 'only use defensive stance for initial enmity lead then be in dps stance all day.' Partly because I played paladin where our sword oath benefit was just doing extra auto attack damage anyway and not something that really changed up our rotation at all.