Originally Posted by
Toppy
While they would be viable in 5 man content, not so much in raid content. Mostly because getting crit immune requires going through so many hoops that the other two tanks couldn't compete. A Paladin, unless out gearing the content, COULD NOT tank the raid boss. The only way they would do so is either getting enough spell power to hold threat but then being in danger of just randomly dying due to crits, or getting enough +defense gear to not be crit, but then everyone has to severely lower their DPS so as not to pull threat.
Bear Druids had it even worse to the point of nearly being none-viable in 5man content too. They take more damage than other tanks, miss far more, and in general cant keep up unless everyone purposefully holds themselves back.
And as always: No we dont have "Much more information about how threat and other mechanics work". Vanilla players weren't stupid no matter how much that narrative may be pushed. Maybe in the early dungeons when they were learning and stuff was still new. But past 40 people generally knew what they were doing.