I wouldn't be surprised if the interaction between the two elsecaller abilities created a third new ability that granted them some sort of aid to their control of the realm
We all should recognize that The Stick is a mysterious and powerful being in the cosmere. Please add The Stick as a reputation somewhere betweeen adonlasium and a splintered shard. We all know it is as it should be.
Is it possible that any of the planets take a figure eight like orbit on roshar this could be explained by the ocean stopping them from seeing the second sun it is just a small theory but other planets like yolen we have not seen yet could have this