NOTE: This is just a basic sketch of what I'd like to flesh out into a real piece.

I'd like to see a new MMORPG that never used Taunting for it's main Tank dynamic. Instead of spamming an offensive attracting ability, I'd like to see a system that force a tank to literally play of the role of protector. Let's say an ogre attacks your cleric. Instead of Taunting the ogre off the priest and onto to yourself, you instead position your body between the ogre and the cleric. Then with a dual-target system (hostile and ally) you select the cleric and you use a Guard ability. Then for further protection, you use a 1 second duration Defend ability that you must somewhat time properly to intercept incoming blows. There's a lot of ability potential here but the basic concept is to really make Tanking about -protecting- your party, not taunting a monster.

Make the gameplay about properly using abilities on your allies and really playing with a fully defensive mindset, rather than an offensive mindset via an ability like Taunt or taunt-esque abilities like WoW's Sunder Armor. I'm going to paste this paragraph into a new design piece as well I think but I'll have to come back to it. I've been brainstorming this sort of feature... revolutionizing 'tanking' for a long time now, but I've never gotten around to really fleshing it out.