It doesn't need 6 skill points per level. It only has 9 skills on it's list (one of which, Craft, is useless). It also doesn't need a more powerful Rage at-will. All I see here is the ordinary Barbarian but one capable of dealing MOARDAMAGE!! Which improves nothing. The Barbarian in the 3.5 PHB is more than capable of dealing more damage per round than a finely tuned Warblade. Adding Scent and Flawless Stride is cool though.