Well for the Pest Queen, killing them fast didn't work out so well .
Would new tiers of void have higher def and lp? Or better bonuses? I know better bonuses would be overkill but it wouldn't make sense to me for any level of void to have high def. The Void Knights don't tank the pests they kill them as fast as they can.
I think in a game with absolutely no damage boosts from armour, having a 10% effect is pretty huge. It'd be more fitting to increase defence & lp boost while keeping the effect at 5%. Void should be statted at lower levels than it requires to wear anyway.
Of course with the upcoming strength boosts & Nex set effects, 10% might become fairly doable.