Clicking one of the three lines on the left-hand side will bring up the various options available to earn that currency, or, in the case of War Games, a brief explanation on how this under-used feature works, and how to set up a War Game. Perhaps this will result in more players using them, but many still lament the absence of a skirmish system, and there doesn't seem to be a gap for it at present!
Moving to the right-hand side, the dice icon next to the Random Battleground is how players will choose which battlegrounds to blacklist. This could be considered an improvement on the current interface, but it's still not entirely obvious that that's what the icon does. In order to queue for specific battlegrounds other than Wintergrasp and Tol Barad, it is necessary to choose them from the drop-down menu at the top right of the screen.