While it's a fine card and scales throughout the game, there are a ton of graveyard-centric / reanimation decks in Commander, and it seems unlikely that Gyrus, Waker of Corpses will beat out most of the pre-existing options outside of something like Jund Hydra tribal (and then, it's not even that good with many Hydras since they are X-creatures, which won't work with the reanimation ability)
Whispers in the Well makes a lot more ink color combinations viable, and brings some truly powerful landmark cards to the forefront
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It's generally fairly rare for a spell to mass remove Planeswalkers, so In Garruk's Wake is a powerful spell to slot into your Commander deck
Killbot is a new creature type that appears in the set
That makes Setzer a solid value engine for artifact or vehicle-based decks that can eventually help you ramp into bigger threats