Stay arms man, this nerf barely hurt arms PvP and sub 20% executes are still the touch of death, all the nerf did was push Arms PvE even lower in dps for most fights, not sure if that was blizzard intention or not but seeing as they could've had a damage modifier for PvP I guess so.
Having execute jump to one of your top damaging abilities from 20-0% is obviously more than what blizzard expected but they have already gone against pretty much every warriors complaints about Arms during beta about it's poor poor design and by god they are not going to be proven wrong now.