Idea; not fully fleshed out by any means;
What DW needs is passive acces to major brutality and and some type of passive healing;
What 2H needs (the ridiculous ultimate not withstanding) is AoE damage capability;
Change the 5 piece DW set;
Plus DW weapon damage
When DW weapon is equipped gain major brutality and/or some type of background heal
Change the 2H 5 piece set;
Plus 2H weapon damage
Adds X splash AoE to single target 2h abilities excluding ultimate which needs no help
Not fully fleshed out and possible completely broken but maybe a starting a point for a discussion.