What very neat ideas you have here! I like all the alternatives presented to the enormously clumsy work-around Dumbledore put together, trying to avoid taking either action or responsibility, laying it all on everyone else. Not something this Snape is concerned about, clearly! Arrogant sod, but well-informed and logical. He has used everything, worked it all out so tidily. Yes, there's still a battle, and it costs, but a lot less.
I'd like to see his post-battle chat with Lucius – and to know what he'd say to Draco.