Expertise Feats

[tiornys]

Are you considering the axe benefit weak because it can be replaced by a brutal weapon? Personally I thought it was a pretty cool bonus, but I have not played too extensively.
for ref:

It's weaker than Brutal 1, and Brutal 1 is already not that strong.

Brutal 1 effectively eliminates the potential of rolling a 1, which has a net benefit of adding +0.5 damage per [W]. That's significantly weaker than Weapon Focus most of the time, and Weapon Focus is only middling in power level.

Axe Expertise replaces a 1 with an average die roll. The math gets a little wonky and you get slightly different results for differently sized die, but on a d10 you gain +0.45 damage per [W] and on a d12 you gain +0.458 damage per [W].