So just what was Belial's plan there?

[Mirajj]

Speaking of which, the scene after that baffles me. "Let's destroy the soulstone!" "Wait, we need rituals for that!" Really? The only ritual that was needed to destroy THE FRICKIN' WORLDSTONE was fifteen seconds of prayer and Tyrael hitting it with his sword. And hey, look, Tyrael's standing RIGHT THERE. Oh, and he's got his sword, too. 2 + 2 = ?

*Facepalm.*

At that point, Tyrael's not the Aspect of Justice anymore. He's not even an angel anymore. He's a human with a powerful sword. But he probably doesn't have the power to destroy such an artifact with a swing.