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There are some very relevant cards which dodge IoK like Yawgmoth, Thran Physician, Goblin Charbelcher, Omnath, Locus of Creation, Primeval Titan or any of the new Elementals, but just looking at the list of most played cards in Modern shows how many other cards Inquisition of Kozilek hits
From standard standpoint its fairly cost-prohibitive and niche, and unless the meta shifts drastically, B decks are likely going to stick to low cost removal
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Summon: Kujata does have the Fire chapter which lets you pitch a potentially game-winning amount of damage before you get one more attack in