Tanks do have access to 1 (not all of them though, but some have it constant and AoE), and have the longest lasting 3, while only 4 can be argued that is countered in itself (I think you speak of charge/pull/pounce here, but is countered by simple snare which is countered by juggernaut/footing, of which tanks have a huge cooldown reduction tactic) by, and in, normal engagement distance. Again, all this combination will have its shenanigans in 24vs24, but right now tanks supply 1, 3 and 4, and surely giving tanks the means to hit soft cap of main damage stat will see more possibilities of 2, where SMs/BOrks or IBs/BGs are currently competitors with some of the forgotten DPS specs, and even with some of the widely used.
I strongly disagree with the statement that DPS classes will not be made obsolete, when currently SMs/BOrks compete in 24vs24 for both DPS and tank slots, and only the lack of DPS stat-wise have not made them an integral part of the sanctity combination, but they are completely accepted as fillers, and way more desired than 5/6 of the DPS specs out there. While this may not be the situation in 6vs6, it's happening in 24vs24, and specially in cities.
I dare you to prove a combination of gear that, at the same gear level, provides less survivability for tanks than for DPSs. You can't cause the base stats of tanks are way higher than other classes in all them, meaning that a tank has more wounds/init/etc than a DPS or healer always, and gear just improves this. Gearing towards survivability decrease the damage potential of DPSs into the non-threatening area, but the same cannot be said otherwise for tanks cause they have a base higher survivability than the DPSs base damage. Right now this is the only thing preventing 24vs24 of being made of 2-4 DPSs and 10-12 tanks. Can be argued that one of the troubles lays in the power given to healing versus morales, but that is entirely off-topic and I would rather not enter into that balance here.
Over crossing the line and giving the chance of soft cap damage stats with the armor and secondary stats of Sovereign will made the balance finally go in the tank side and kill some of the borderline viable specs for WBs, which to be honest is all of them but 3 out of 36, while tanks right now are in a place where only 2 specs out of 18 are not viable while the rest are accepted/required somehow.
24vs24 is about area pressure and morale bomb, and tanks currently win, by A LOT, in morale bombing. If you can survive the 1st enough to drop the second in masse, you win 2/3 of the times. Single target or AoE are quite an important consideration only for DPSs, tanks just have core powerful morales, and so they produce burst when required. No matter how you see it, the highest burst damage of the game now comes from morales and not from skills, so as long as you can survive enough to build the correct morale, you win by coordinating a drop. Remember that we are speaking of 16-24 morales dropped in a very short window of time, normally less than 2 GCDs.
According to this thread and your very own post, 1) is false, but moreover is also false in 24vs24 where SMs/BOrks are currently used as off-tanks, and seen more and more 2h than SnB for quite an obvious reason. What you say that is bad for 6vs6 in 2) is the current state of 24vs24. The amount of possible combinations and setups is extremely limited to the point of non-existent, and is mostly due to the severe competition between tanks and DPSs, that currently only 3 specs win, but every other DPS spec loses, and is preferred an off-tank over them every day. Hell, some specs are even considered memes, while I dare you to point more than 1 tank meme spec (we all now which one I'm speaking of), and that's out of 9 possible tank specs per realm.
And well, this is why I disagree and why I think that the current health of most DPS specs in non-existent in large scale. Having a side spec be as effective as the main spec of other class is, IMO, very bad idea, and will surely create shenanigans, some obvious, others less obvious.
Back on topic, I do see some minor bonuses change, and some other things swift, but I honestly hope for toughness to stay there so tanks stay tanks, DPSs stay DPSs, and that gear gap doesn't determine your class. In any case however, I expect that city content doesn't get moulded to 6vs6, and stays as large scale content, cause I can completely see and accept Lost Vale gear getting the 6vs6 roles and stats. If it's party size content it should have party size stats. The opposite is true too.
