While I agree with you Xebtria in that we only have dodge, we DO currently have the advantage of being overstuffed with HP. So taking that into account the problem is not that we'd die instantly if we got hit, but that we become a problem to the healers if we get hit too often. Our survivability lies in our huge amount of HP. I like that the druid is different in that fact alone. Our armor is also bloated so the idea it seems is that our survivability lies in the fact that yes we will get hit, but not as hard. And when we get hit often, we have enough hp to last until MANY MANY MANY heals come.
My fear is that Blizzard will also agree with you and will eventually reduce our hp, reduce our dodge and stack on some other form of damage mitigation.
To tank X boss should mean that a healer should have to only use X amount of mana on equally geared tanks. If we look at it from this point of view, giving us increased healing could make for leveling the playing field without making us furry-warriors on four legs. So yes, we take more damage, but we also get more healing.
I like being a druid tank with bloated HP and Armor, make those work for the raid and problem is solved... perhaps?