Aye, I like the downed mechanics, and more what I meant by the "I wish this game had a tank role" is more even something like ddo(where the tanking taunt ability is an optional feature) still an "everyone can fill any role" thing, but with the ability to force an enemy to focus on you instead of an ally(such as one close to death, or one ressing downed players), guardians have one ability which does that(greatsword sword throw thingy), but it doesn't work on all enemies.
Having a taunt or something would also make shields more useful, as currently they are, oddly, more for pvp then pve.