Yes, the proc effect of Val’anyr, Hammer of the Ancient Kings has now been explained. I'm happy about the way it seems to work. Any class would do well wielding it and that supports my opinion that it should go to someone based on loyalty and performance and not class.
Stats and procs aside, I'm quite interested in the physical properties of the mace. A few questions pop up:
What's the theory behind the force that is holding up the top of the mace? The power of creation?
How heavy is the mace to wield? Is the weight of the top transferred through the beam or is it more like waving a light saber or pointing a flashlight? If you can't feel the weight through the beam then you could lop a few heads off clean.