Streamlining inherent in the new talent
The first thing to report is leveling a warrior from scratch in Cataclysm is probably the easiest it has ever been. Part of that is of course the new leveling experiences for the worsen and goblins, but I also started a blood elf warrior to see what that is like, and the streamlining inherent in the new talent and ability system made Forsaken World Gold felt there as well.