Here are my 2 cents, Ive been a tank since 2.0, no main tank, I play them all, thats a few years tanking and have played all styles.

My conclusion so far is that lazy-tanking got way easier this time around. If your sole purpose is to keep aggro and apply a defensive cooldown every once in a while then its easier now than it has ever been. Your party will probably be happy with you if this is all you do (im not cunting hardcore content) and you can watch netflix while tanking most content in the game, like 95% of the current content.

Optimal tanking remains fun and engaging.