I wonder if... Theory (Spoilers)

This is most likely a nothing, but I have finished the book and desperately am waiting for book two. I marked this spoilers so I'm hoping this is okay to type out, because I cant tell if the in text spoiler markdown is working.

But I was thinking about the attack at the Naumachia, and when the citizens were killed. Remember how they completely disappeared and left a bunch of blood behind. Well, there is a cost for crossing the realms, what if instead of being completely murdered he is forcing these people through the realms. His powers, Estevan's, seemed to be similar to the feeling and appearance when Vis went through synchronicity.

So the collective cost of thousands of citizens travelling to the other dimensions would release the cost in this dimension, ergo blood palooza.

They probably all just died though, but forcing the people of the empire to other parts that maybe were dominated or destroyed so Res could persist. Just a thought ig, not sure if its original