Personal opinion here but as someone who enjoys building my factions with personality and a story, I gain a sense of accomplishment with ascending champions who have encapsulated the theme i was running them with.
In a recent match I wanted to build a zealous nation of religious fanatics, blessed by the holy light of an insane and unappeasable monarch. The kind of people who seem perfect to themselves but see only flaws in others, their golden armor hiding their inhumane nature. I was disappointed when the golden armor effect of anointed people was over-written by Demonkin.
What if I wanted to build a race of Fallen angels, armor blackened by their descent? My point is it limits players abillity to play into a theme and i think that is one of the best things about AoW4