As a "highlight," the design team got better at identifying what players want in a set with the 2019 releases, Rosewater wrote. WOTC has classically designed most of the Magic sets in existence from a pure mechanics and theme standpoint, and player suggestions often went by the wayside. But in recent years, Rosewater and his team have been using polls and Twitter to source player opinion data, and translating it into themes for cards and mechanics. He pointed to Modern Horizons as an example of a set that responded to long-time player feedback by including Changelings, Silvers, Ninjas, and snow as card sub-types. Responding to player requests is undoubtedly positive for sales.
In addition to the misleading name choice, Rosewater recounted feedback he received that indicated players had a tight window of time to draft Modern Horizons before Core Set 2020 arrived. For retailers, this couldhave hurt sales of Modern Horizons with the two sets essentially occupying the same short sales cycle, and Core Set 2020 having a lower price point of the two products.
War of the Spark offered a planeswalker-themed set that the player-base "loved" according to Rosewater. They enjoyed getting a planeswalker per pack, and the response to the event set was overwhelmingly positive. The sales ramifications of War of the Spark's solid reviews are a partially known quantity at this point because it hasalready over-performed in sales (see "'Magic' Sales Drive Hasbro Q2 Growth"), according to Hasbro.