I see two problems, at least. First, you should get Heart Strike. It's only 1 talent point, it hits a lot harder than Blood Strike, and removes Haste effects when applied. Second, you should find a way to get Toughness. We're still kitable, so anything you can do to reduce that problem will be pretty important, and also the talent has some synergy with Bladed Armor. These two changes might be hard to do because of how deep you went into Unholy, but you might want to play around with it.