During the Gears of War: E-Day Direct, which took place after a packed Xbox Showcase at Summer Game Fest, we got a good look at some of the big changes The Coalition is bringing to the Gears of War formula established nearly two decades ago. In short: Marcus can jump. Gears of War has been defined by its big, brutish protagonists who look and walk like tanks. It was the series that helped define waist-high cover when cover-based shooters were…