All that about no defensive 2H weapons makes sense... however... it seems like CaBaNa mainly wants a defensive weapon.
He mentioned before that he'd be happy to use an urgrosh, if they weren't banned. The urgrosh is superior, +2 proficiency, 1d12 on the main side, plus defensive on the off-hand side. Compared to his original proposal, that's +1 lower proficiency, and axe instead of heavy blade (but everyone seems to agree that's no problem to handwave along with reskinning it as a scythe).
Now, it's technically not two handed, which would make a difference for some characters (like barbarians), but for Kamotz I doubt it makes a difference. It's effectively two-handed in that you can't wield it and also a shield or something else in the off hand.
And... I'm not really sure where I'm going with this, just that it seems like what he's asking for is not really all that outrageous. If the urgrosh weren't banned, and he could reskin it, he'd basically be there. I guess to go with Waraxe/Parrying Dagger, he'd need two feats. At that point he might as well go Waraxe/Shield. Was the point of banning the urgrosh and other double weapons that you got too much for one feat?