Warriors are by far the hardest class to play at 60 (aside from your random lolstorm into mobs of level 52's in AV turtles, or unless your playing Prot) This is due to several things.
1. Rage starvation: there is not a lot of rage being produced unless you get a nice stream of crits going, and it can really be a killer.
2. NO SPELL REFLECT: worst thing ever at this bracket, once both your charges, and engi shit is down, and a warlock is casting a chaos bolt at you or something, you have no way to defend yourself other than to eat the crit in defensive stance, usually leading to your death.
3. Most of the pve gear's equip bonuses have + defense and damage mitigation, rather than damage output, aside from the HWL and GM set of course.