I agree with you, DRK needs a useful 2h, e.g. you are able to take more damage than your HP, means if you have 100HP left and take 300 damage you're at -200; up to -maxhp for 3 minutes; when the effect wears off your current -HP become +HP; this way you get HP: the more damage you take, the more -HP you have, the more HP you have when the effect wears off.
or at least make blood weapon work with WS.

A+ great sword skill (yes, please.)