Warriors struggle to maintain aggro on groups of 3 or more, little to no health regeneration, one major debuff (challenging shout) to cause threat and a minor one (taunt). No AoE in defensive mode but Slam and Devestate. So here comes another patch and lets make the Paladins even better at tanking and AGAIN do nothing but throw the warrior class in the dirt, a class that gets laughed at in battlegrounds, a class were you have to be so highly geared to even get in a 25 man raid it takes months to get the gear as you beg to be taken on those higher lvl raids to get that gear. Will there ever be a patch to make warrior a competitive class again? How many warriors are in the Arena? How many have shown up at you Competitions? Blizzard DO SOMETHING!

Warriors = single-target tank

Druids / Paladins = aoe-tank

IMO, Druids > Paladins at tanking due to being (a) a dodge tank and (b) requiring less healing. My guild has run with both and most prefer me (druid) to tank since I'm easier to keep alive.

But yes, Warriors since the beginning of WoTLK have been left behind. I have an 80 prot warrior with mostly quest stuff.. and he'll probably switch over to a dps spec as its a bore.

Don't forget about DKs.... Blizzard hasn't. Patch 3.2 is seeing some Death Knight tanking ability nerfs. Mind you, they are currently OP; self-heal via damage done, large amounts of mitigation, plus they can DPS at the same time as tank.

Kind of besides your point of Warriors, but I thought I'd point it out. Personally, I think Blizzard spends a little too much time listening to the super-guilds that can clear Hard Mode instances a week or two after they come out, and not enough time listening to the guilds that bang their heads against the wall week in and week out.

Sadly, even though I don't agree with Blizzard's PoV, I do understand it. At the top of the game, everybody is equal, and it is easier to judge where imbalances lay.