I noticed when I played POE2 through that random champions would spawn with random skills. LE should implement something like that instead of drawing from a fixed pool of pre-defined champs. It’s more interesting if you need to figure the fight out as you go.
Edit: I suppose they sort of do this already with rare monsters, but they don’t seem tough enough to be concerned about. Also, the rare monsters are very common. The random champs should spawn rarely, be random in skills, and tough enough so that you are concerned about dying.
No, Champions are fixed. They have a unique name and a unique set of abilities. There’s only a fixed number of them and they don’t change their skills.
They’re not like rares where any mob can be “promoted” to be one.