Hmmm what? I don´t know where i´ve pointed out that you shouldn´t play the job, but ok. Since DRK has even more DPS than the other tanks, it´s more efficient isn´t it,? (Especially in big pulls with all the aoe?!)
Healers aren´t under pressure, the most barely use even all of their oGCD´s and probably never use casts, unless you´re AST and want to procc horoscope. They want something to do, just check out the heal-forums.
There is no need to balance subclasses in itself, when they work pretty even. As i´ve said, WAR is the only one with 1 superior tool against the other 3. It needs definately a nerf and overall all tanks need a nerf. As others said here and in other threads, it´s not up to the tanks kit, it´s up to the player. A bunch of ppl are godlike tanks while others suck with a broken kit, no matter which tank they´re playing and that´s acutally my experience too. But classes shouldn´t be balanced about the worst players available. Just because ppl don´t know how to play or just don´t want to put efford in their job, doesn´t mean that a class is useless or needs to be buffed. Again, all tanks are broken, WAR has a superior skill, all of them need a nerf and / or the content really hard hits and less telegraphs.
We already had more than enough dumbdowns with SHB to make "tank more accessible for newer players". Tanks have been non-stop broken and it has become worse. If you know a bit what you´re doing, you´ll carry the whole raid, even if you eat 3 aoe at once. Accessibility shouldn´t mean "3 buttons with godmode".
One of the reasons why a lot of players lost their interest in tanking are all the dumbdowns and nothing to care about even in savage raids. The tankmounts aren´t any help to get more players into tanking too, since they´re getting farmed unsynced. Once such newcomers will get confident with tanking, they probably switch to a DPS class with something to care about too. Imo the only reason to be a tank is to have "fast daily-queues".