If the first board was Stormwind, then there was no world where Orgrimmar wasn't going to be the second. While Hearthstone was never intended to further the Horde vs. Alliance rivalry, we couldn't very well not acknowledge its existence either and players want to see both fully represented where possible. After all the initial iteration that went into the first board this one came along at a much faster pace and in fact many of the corner elements were specifically chosen for their animation opportunities. The catapult will always be one of my favorite resulting interactions on a board!