Such a mystery. What is the musical application? What is the overall intent? How do we approach this in a way that makes sense? For example, odd time signatures offer us a change in where '1' lands, leaving the listener tapping their foot or snapping their fingers on the up beat and wondering what happened. A sort of startle effect. As subsequent bars accumulate, they sort of get it. The odd subdivision, at least to me, isn't about achieving some mathematical calculation in the listeners mind, but rather a complete disconnect with the straight time that preceded it. But that said, I still came away with an interpretation (of how to play it as a player) of 12/16 + 8/16.
These are the kinds of details that I think we're in need of. Otherwise, we're just being competitive with the next drummer out there. Which would suck IMHO.