Blizzard has stated that melee teams in arena (2v2/3v3 brackets) are imba versus casters teams for various reasons.
Warlocks are at a good place (maybe still OP) versus casters but melee still chomps us easily. What I was thinking of was maybe a talent like Soul Shatter that only has one rank ever and you can learn it maybe somewhere around 60-70 that reduces physical damage for a brief time:
Instant Cast 5min CD
10% Base Mana
The caster is temporarily bolstered by Shadow reducing physical damage taken for 6 seconds by 50%. This armor does not override existing armor spells and can be used while stunned.
It would be a way for a Warlock to survive in 2v2 versus Rogue/Warrior or DK/Ret Paladin who just Charge/Death Grip you in regardless of partner and tear you up instantly. I don't think 6 seconds is too long and it's only 50% physical damage reduction.
What do people think about this? Is it OP and if so why? We could still be stunned or interrupted and vulnerable to CC but this would help physical burst. =D