Im not a Marvel Expert, but Vibranium, while not as super-duper insanely tough as Adamantium, is still very tough and enough to survive most situations no?
If the idea is...it somehow magically converts kinetic impact into store energy (can be discharged later), then almost impossible to break Vibranium with kinetic impact, no? Or maybe Vibranium can be cut or pierced more easily. Maybe someone with more knowledge can explain more.
The Predator King seems to be a glorified Chieftain. He is the King of a big tribe with two sons and their respective actions. Its not weird to me at all. Weve already hade Predator Elders with flowing red capes, so this seems more like a title change, or just semantics.