WTF! Why does the camaro get the 3.6L DI motor standard and the CTS gets the 3.0?

Even the SRX gets the 3.0L motor???

Talk about going backwards as the cars get heavier and need bigger engines.
I don't even want to talk about Pontiac.
Well, luckily they really stepped up the game with the Aveo-up to 108 hp. Who needs a Camaro when a beast like this is available?