I guess the biggest issue is, like you said, the COMPLETE lack of a build path for dual wielding. Scoundrel encourages single daggers for optimal damage and butt poking, while Warfare heavily encourages massive, bulky weapons that only Thor himself could logically lift.
While I know we'll never get it: A Berserker Tree. Take a few from Warfare and make a rage-based, all-in build path that rewards diving enemy lines like an idiot.
Warfare should be disciplined and focused damage. Right now it's just a chaotic mess. Give Dual Wielding a viable path and make Warfare more logical.
And honestly, just make Single Wielding have some other benefit and still cost 2 AP. For exaple: If you only have 1 weapon and no offhand, you start the turn with 1 extra AP, up from 4.
