Well, yeah, they have tanking cooldowns, but other classes have defensive cooldowns too. The guard ability in TOR is more of a stance: it's always on as long as you're within 15 yards. You set it ... and forget it! And sure, Divine Guardian in effect does the same thing as TOR's taunt when used on players, but the taunt is on a 15 second cooldown. Defensive cooldowns aren't the same as tanking abilities. My gunslinger even has an ability that makes all allies within X yards take 20% less damage from weapons, and he's pure dps.

I understand your point, but what TOR does is make your basic tanking tools be usable in PVP. You'd never cast taunt in WoW during a BG. Another thing I didn't mention was that TOR rewards tanks for doing tanky things by giving medals at the end of the warzone. There are medals like doing X amount of damage in a single hit or overall, or healing X health overall, etc., but there's also ones for defending other people. Overall it just feels more like you can go in with any role you choose and have specific things to do: DPS will damage, and healers will heal, obviously, but tanks also get to protect their teammates.