Get your speed up to three and you can cast Sorceress' Schemes for one red mana
This makes it a bit unexciting, even if it can perform well in some games
Flashing back an instant or sorcery spell from your graveyard for free helps you get more mileage out of targeted removal and other cheap spells
I think the fact that Inquisition of Kozilek is more limited in scope this way definitely makes the card more interesting, but its universal enough that it helps alleviate Moderns historical issues around having too many narrow disruptions spells
Who knows where, or indeed if, this deck will eventually settle in the meta, but since multiple cards from its list are rising in price, there's definite interest in this Golgari Crimes variant
Anthems like Death Baron are removal magnets and do nothing alone build a board first, then pump it