It does have more armour damage and headshot damage you’re right.
Even with that advantage, on Cata, the uptime of that niche is too rare. If you play on difficulties where it’s not rare, and there’s more Chaos Warriors or Elites, then you end up not being able to deal with the situations, due to low Stagger Cleave anyway.
Whereas with 1H Mace, you could Stagger multiple enemies, and then snipe with headshots during the Horde - With 1H Axe, you’re pretty much kiting while fiighting, and other enemies take the place of the one enemy you’ve hit, so now you’re on a full health enemy again.
The reason I was more focused on AS was that it still only hits one enemy with every attack. Even with optimal builds this makes it feel horrible on mixed Hordes, and other more versatile Weapons do it’s job better, as they actually add the safety of multiple Staggers and multiple kills. It’s one of the only one-handed Weapons, which feel like you’re getting overwhelmed almost constantly.
The reason it works on Zealot, is because getting hit on him is a good thing for high end play, and doesn’t really matter, whereas most other playstyles (even Slayer, due to low burst, Stagger AS for On-kill), end up playing too defensive with it - due to more unstaggered enemy uptime.
I’d also argue that, due to Bardin’s headshot angle with the axe, even overheads aren’t possible on Chaos Warriors most of the time. Even if you aim for the head, you’ll get a body shot.
As this is a light 1H Weapon, I would expect it to be viable on ranged Careers, without the use of S+ tier AoE Cleave builds, at least.
Would love to see some footage of people saying this Weapon is good, playing on Cata vs mixed Hordes, and not on Zealot.