I doubt it. (This was a response to the question whether the spellblade will still work)
I'm pretty sure blizzard will also change malev spellblade so it'll have half the pvp power just like the tyrann spellblade so you have to use the pvp off-hand item to compensate for the halfed pvp power. Which means using a spellblade will simply reduce your damage done because a second agility dagger will have the same pvp power on it.