With the DB patch, or pc yesterday's patch ?
With the DB patch, executioner is far better than before. It's no longer a passive, it's one of the best execute in the game, and even the area morph is really good.
Critical rush is buggued, but that's his only "hit". Well, it's a pretty big one, I might said.
Wrecking blow need a boost but not a pvp one, just a pure pve one. Two handed is not good for pve mostly because this skill don't have the power of rapid strike while considering all the advantage dual wield have.
Dizzying swing is totally fine for pvp.