Parry: How would you improve it?

[Lyth]

I feel that unless warrior gets a parry-driven proc, it will lag behind any changes made to paladin or dark knight in the MT role.

Interesting that you should say that. WAR actually does have access to such a skill as a cross-class: Haymaker. It just doesn't get used because it's linked to a dodge proc (and most tanks tend to trust dodge even less than they do parry), and because it remained on GCD even after Shield Swipe was switched over to oGCD.

It would be interesting to see what happened if they made it oGCD in keeping with Shield Swipe. Featherfoot doesn't boost evasion as much as DA DD, but it has an interesting synergy with Haymaker, and there seems to be a broader selection of attacks that you can actually dodge after Heavensward. This is something that you could potentially even implement in this expansion series with a few tweaks.