Eh, I kind of would prefer this if other aspects of Necromancers were nerfed instead. As is, they are largely wizards with Find Weakness and Food Preservation, in return for fairly suboptimal class abilities. I agree that Necromancy is more of a bother than it is a boon often, and this might help rectify that.
The risky abilities are penetrating melee attack and regeneration. Bards already have access to Claw/GreaterClaw/Killer bugs, which admittedly can solo the game on their own. This *would* make Moloch undead fairly absurd. Still, might merit testing.