Taunt is so good that threat is a non issue.
I am slowly coming around to the 2H warrior. It plays differently from dual-wield warriors and rogues.
2H warriors are all about specials. Either time your specials immediately after a melee swing, or just chain them if you know you can burst down the enemy fast enough.
The 2H warrior is VERY gear dependent. Get a good weapon ASAP. Mauls are better than swords/axes, but of course a Tier 7 sword like starfang is better than a generic lower tier maul. If you have warden's keep, then try to get the 2H version of starfang early. This will tide you over until you can get Chasind Great Maul. You will need 2 treaties (or 1 treaty and the urn of sacred ashes) in order for the Chasind Great Maul to become available.
Getting a good set of heavy/massive armor early will also be key. Your defense will be so low that you will get hit a lot early on. It can be very frustrating without tons of armor. The blood dragon armor or warden commander's armor are excellent early choices.
For dex, the only reason to put any points in at all is if you want to use bows and get some of the better archery talents like arrow of slaying. At higher levels, you can makeup for the lost defence via buffs like rally, heroic defence, glyph of warding (underrated spell). At lower levels, you're still better off stacking armor and going with strength alone. You'll take more damage per second, but you'll also kill things faster so you'll take somewhat less damage overall.
I haven't found willpower to be very useful at all. If you have warden's keep, warden commander's armor gives more than enough stamina early on. You can also use rejuv and mass rejuv as well as sonf of valor early on to keep you pumping special attacks. Once you get deathblow, I doubt stamina will be much of an issue at all. Just be sure to get the killing blow.
I am comming around to precise striking. Early on, the additional hit helps. It's often not worth it to delay your swing timer by trying to get around into flanking position. Since you'll rarely get the bonus attack from flanking, missing becomes an issue. Precise striking helps in this regard. It also helps by increasing your crit chance. The attack speed reduction is less of an issue once you adapt to the "special-attack-centric" playstyle.
So far, I find powerful swings isn't worth it. Attack bonus is at a premium early on. Perhaps at higher levels, with enough strength and buffs it'll become worth it, but for now, I never turn it on.
The thing to realize is that as a 2H warrior you will be VERY VERY gear and buff dependent. Haste, Song of Courage, Rally, War Cry, Miasma, Death Hex, Heroic Offense, Heroic Defense, all help you approach (and for short bursts surpass) the dps of a dual wield warrior. The only big advantage a dual wield warrior will have over you will be AoE dps because of dual-weapon sweep's 15 second cooldwon and whirlwind for added AoE burst.
Focus on buffs that increase:
Attack Rating and Crit damage. These benefit ALL your abilities.
Next tier of buffs are those that increase:
Crit rate. These increase all damage except that from mightly blow and critical strike.
Next tier are buffs that increase:
attack speed. While these only significantly increase auto-attack damage, they are usuall so Massive (25% from Haste for instance) that they are worth taking.
Finally there are buffs that add a fixed amount of damage per hit, like runes, poisons, flaming/frost weapons etc. These are the least valuable as they don't scale with weapon speed and don't get applied by special attacks.