Modern Blizzard apparently also lost grasp of what Diablo is. Since in Diablo III they tried to implement item trading between players. The whole item trading idea is absolutely incompatible with the roguelike genre, which builds completely around player solving problem with limited resources, given randomly on each playthrough. Taken to absurdity, roguelikes are similar to point and click adventure games, but with randomly generated item puzzles and RPG elements, where player develops character around what is available. Diablo also added real-time action element, to make it appealing to wider audience. Beside that, roguelikes have repeating tropes, like cursed items and scrolls. Original Diablo omitted that "cursed" element, despite it being very important to the genre, because it forces player to consider trade offs and taking risks, instead of just identifying each item (identify scrolls are rare and valuable by design). But I guess you cant expect Bobby Kotick to play Nethack or even original Diablo.