Originally Posted by urotas

I can't see them giving druids twice the health of other tanking classes, as that would be a nightmare to balance. Losing our armor advantage would be a bigger loss than you might think too. I'll assume a boss hitting for 20k physical damage base.

A druid now would have 75% damage reduction, and get hit for 5k
A warrior with 20k armor and 10% from defensive stance has 66.32% damage reduction and gets hit for 6736. After 500 block value he'll get hit for 6236.
Druids may have slightly lower armor than warriors in Wrath, say 19k equivalent in lvl 70 values. The new druid would have 61.37% damage reduction, and be hit for 7726 damage.

That's a 55% increase in physical damage taken compared to live from losing our armor to lower than warrior levels. Getting a hypothetical defensive stance equivalent isn't going to compensate for it by a long shot, unless we also get something for the many other advantages warriors have. Having a high armor defines our tanking style right now. If we lose that, it'll require very big buffs elsewhere to compensate. I don't doubt their intent to keep druids viable as tanks, but I wonder if they realize how big of an impact losing our armor will be and how much we depend on it now.