Empire's new 1.3 patch is out, and will update via internet fairy dust when you relaunch Steam. The fairly chunky list of changes and fixes can be read here. The patch includes fourteen new units to replace generic unit types for specific factions in the game. There's also DLC up on Steam, the details of which are here. The micro-expansion unlocks fourteen elite units, including US Marines and Russian Gardes à cheval, whom, it is noted, "were selected not for their soldiering ability but more for their relative attractiveness to Catherine the Great."
They're bringing sexy (horse)back.