What I meant by my post was that there are currently too many tanking classes in comparison to how many total jobs there are presently.. I feel that 1 tanking job is sufficient considering we only have 7 (soon 8) different jobs. Certainly as the 24-man content is released, and more jobs start to make an appearance, there is room for different tanking jobs but I don't think there should be as many tanking jobs as their are pure DPS jobs (which currently there are). However once again, there is only room in a party for a very limited number of tanks, and varying that too much will cause people to cry about "not playing their main jobs" as the slots are limited.
I agree with this, and is pretty much what I already said. There are many different ways of dealing damage, however taking it is rather limited.Now if the devs were to introduce SAM or BST as tanks to take up the spot on the tank roster occupied by WAR, I might be willing to support making WAR a full on DPS.
You're going by the logic that divided people between "blood" tanking and Utsusemi tanking, which is fallacious given that the tank role is pretty much straightforward no matter how you slice it. The main difference between tanks should be along the lines of flavor rather than mechanics. That's what distinguishes the guy with a sword and shield from the guy with holy magic and a shield from the guy with a two-hander. You stray from that and you start forcing people to cherry pick jobs for their group comps.
To be honest, I would rather 1 tank with 30 DD's taking down an enormous mob.. Call me a traditionalist but a lot of "dual tank" mechanics end in a main tank holding the boss, and the off-tank sitting in a corner voking adds all night. It never ends in a fun battle mechanic for the off-tank.8 is an iffy number for a full party, mostly due to what it allows in a group comp. Ideally that could mean two tanks, two healers, a bard, and space for 3 DPS. Limiting groups to one tank limits the developers as far as what can be done with encounters that require a full party. Sure, stuff like behest wouldn't require much, but a dungeon boss with mechanics might require an additional tank either for adds or taunting off each other or something to make the encounter interesting.