I like your ideas, apart from making Quietus no longer restore MP without Blood Weapon. The ideas make strides to improve the job without changing it completely based on a player's view of what DRK "should be", no offense to those who brought suggestions of reworks but I don't feel like a MCH style complete redo is feasible (until 5.0), and speaking from personal opinion don't want it.

Your approach seems much more immediately doable and would still help DRK in a few ways so I like it.