I get the sense fom your post that you feel that holding enmity is our defining trait.

This isn’t strictly true - holding enmity is a part of the role but they just got rid of the stress of the old tank stances and enmity generation. Now the main focus is enemy positioning, mitigate damage from tank busting attacks, protecting party members and the off tank in dual tank situations and finally dps so we can help kill things. Once you satisfy the first three you can just focus on maximising your rotation. Tanks have a few duties still even after the changes to enmity. I still mitigate big hits and protect party members from raid wide aoe damage.

Tank stance dancing was an annoyance more than an interesting point. I now feel more focused on mechanics rather than having to worry about whether everyone has used diversion so I can maintain dps stance like in 4.0....it is rather freeing for me