Wrath of the Lich King changes of warrior

Spells Battle Shout and Commanding Shout will affect the raid, not just the party.

Talents Titan's Grip is a new fury talent and allows warriors to wield a two-hand weapon in one hand, thereby allowing two-handed dual wielding.
Protection warriors have a new spell called Shockwave allowing them to damage and stun all the enemies in front of them.
Bladestorm is a new arms talent whirlwinding 4 enemies in range every 1 second for 6 seconds.
Protection Blizzard improved the protection spec so that it is more viable outside of tanking by increasing damage, with improvements to all damaging abilities, including Concussion Blow. Shield Slam will also be available to all warriors now.

editUnderpowered debateA lot of players have complained that the warrior is severely underpowered when compared to other classes, specifically Retribution Paladins and Death Knights. Most noteably, is their rage gain. It has been proven that rage per swing with a Two Handed Weapon differes greatly depending on gear, Armor Penetration rating, and weapon quality.

The warrior's lack of healing, aside from the Last Stand/Enraged Regeneration combo, also puts it at a disadvantage to many other class, especially paladins. Warriors have also been shown to be out-damaged by almost every other class.

But warriors have had their advantages over other classes as well. The warrior's extended immune to Fear and Stun effects (apart from a Paladins "Bubbles" and a Frost specced Death Knights Lichborne abilites) and their uncanny ability to cut down healing have made them a fury in PVP when played properly. If a warrior can get in melee range of a Ranged DPS class, there is very little stopping them from cutting down their health, aside from Snare effects.