I haven't done any heavy math on it yet, but yeah, it appears to me that the new axes from Adventurer's Vault are intended to bring various Dwarf builds up to par, probably because the damage bonus for Dwarven Weapon Training is itself insufficient. Given the tightness between attack rolls and defenses, bonuses to attack rolls are much better than bonuses to damage rolls. Maximizing attack rolls dictates a weapon with +3 proficiency, and attack bonuses with blades appear much easier to come by than other weapon groups. So the idea appears to be allow axes to hit harder, but less often. Does it work? Dunno yet, but I am going to give it a run for the money.
A basic melee attack with a Waraxe on average deals a little over a point of damage more than a Battleaxe, accounting for critical hits. This is likely (dare I say it) dwarfed by the benefit of using a +3 proficiency bonus weapon, such as a Bastard Sword. As bonuses to damage rise, due to stat increases and enhancement bonuses, that +1 attack bonus makes more difference.
I have not yet done the math, as I've said, but I am willing to bet a maxed sword swinger still has more expected damage output than a maxed axe swinger, especially at higher levels.
It appears to be a paradox, but if you want to deal more damage, increased damage is a sucker's bet compared to bonuses to hit.
Smeelbo