I like it. It retains a lot of Russian flavor while adding in Necromancy into the mix. The only issue is internal conflict. If you've got this nice autocracy where everyone is reliant on the system or bound to the monarch, there's not much going on. I would say there should either be a plot headed by the vampire lord that maintains free will or a re-skinned communist revolt being planned. Something to give some possibility for change in that country. I'd also look at having a plan for border skirmishes to give quests for any adventurers in the realm or in a neighboring one.