My solo toon is a rogue.
I'm combat in PvE.
I'm Mutilate/Prep in PvP.

My PvP gear blows, compared to what you're testing with.

While I have cooldowns (Blind, Cloak, Cold Blood, Dismantle, Evasion, Sprint, Vanish... and Prep for almost all of those again), I am very much OP in random BG's... Mix of full Ulduar 25 PvE and some assorted PvP/Honor gear.

Sprint + Evasion rocks.
Cold Blood + Mutilate is insane - 2 automatic Crits.
Dismantle makes melee gimps.
Vanish is unreliable, but with a /Stopattack, /Cloak, /Vanish macro, its half decent.
Blind is fun, but allies almost always break it fast... not if you play everyone.

When my rogue is stunned, I have no active defenses.
All my defenses are basically dodge based.
I'm very hard to hit when in control of my toon, and am a gimp when stunned.

Boxing will be a bit different, of course...
But that's my limited 1x boxing PvP BG experience.