Any particular reason? Blizzard can hardly make design decisions a traditional RTS player fundamentally disagrees with - this is not a company that has ever been known for innovation, rather it's one that's made a fortune over the past two decades from precisely two game engines, one ultimately based on an almost exact reskin of Command and Conquer in a fantasy setting, and the other a hack-and-slash game of the sort that's been around since the Spectrum-era Gauntlet and (in isometric form) the early '90s RPG Shadowrun.
Blizzard almost makes Creative Assembly, a company known mainly for a single game engine (half of those games reskinned sequels, and the others the same basic game set in different time periods) and one that's been very slow to adopt new design elements even after they become genre standards (strategic resources, technological research, in-game encyclopedias, visible diplomacy modifiers etc.) look, well, creative.