It is definitely true that the early turns are important and not being able to cast most spells would make it difficult. My main hope isn't to have all the necromancer spells or summons use corpses, but to at least have a few. Having a summon get a buff from getting summoned from a corpse is a pretty good method. However, there could also be a spell or two that require corpses and have powerful effects.
My main issue is still that current necromancy skills almost all use blood rather than death magic. And honestly, I would argue that blood is more a force of life than death, which is why all damaging spells with it right now work by removing or corruption blood.
