Casting Crux of Fate would have a completely symmetric effect, and wouldn't accomplish much, so let's suppose instead that you do nothing
Lands that add more value to this deck are Echoing Deeps, Treasure Vault, and Forbidden Orchard
I don't see this card seeing much play in other formats
Lots of spells in recent sets interact with the Graveyard in some way, like Tenacious Underdog, and Exile shuts these strategies down completely
This can even lead to a meta Hope Spot, because it's entirely possible to be capable of winning the duel with Wiegraf and then be incapable of winning the fight against Velius/Belias, a boss that could be even more difficult than Wiegraf, that happens immediately after
Soul Shatter and Sheoldred's Edict give you ways to force more sacrifices, giving more opportunities to turn their creatures into your cybermen