Suzaku redeemed himself when he joined up with Lelouch and now the world has an actual defender of justice. He can never show his face in public because he is supposedly dead. Kallen was never meant to be Lelouch, maybe so if CC never existed. The ending wasnt so open: Lelouch an CC are immortal and are just livin their lives, Nunnally has Britannia and Britannia no longer has the noble and inheritance system, the rebels are living out their lives, Suzaku is damned to not show his face. and yes, Lelouch is alive.