They repeat the same thing over and over again each year and that's why Smackdown vs. Raw 2008 was a big let down. The only good thing in the game was the Extreme Rules Match/ New Weapons System and ECW. The season wasn't really that good and the whole 24/7 concept was annoying.
When you are playing as GM, you can't start a superstar season, why? It sucks! You have to end your GM Career and then start again as a Superstar, and you can't play as ECW in the Season mode! That's the biggest problem! So that isn't the best Smackdown game!
Smackdown vs. Raw 2007 was great. Although there were little new features, the gameplay was fantastic and that has to be one of the best Smackdown games in the series.