I think this sort of reorganisation will be inevitable in the aftermath of whatever is going to happen.

We're obviously going to lose a number of territories (perhaps even ducal capitals?) and it would be surprising to have it turn out that all houses are equal at the end. And who knows, perhaps there will be major losses of avatars, etc? Keeping exactly the same structure as currently may not make sense given that.

However, I do think that these sorts of changes should be regulated by the Diet at the time the world stabilises. I do like the idea Kagemusha.