Possibly a big thing that needs to happen here is we get a new class of "nearly-boss monsters" with say green names, to help differentiate between the two types of mini-bosses we have now (traditional Named mini-bosses, and the trend of non-named mini-bosses that can heavily fill portions of a quest like wood woads and drow blademasters).
Mobs that remain orange-names can retain a high % of being champs (still would prefer 50% or less, otherwise why not just make champ status default for them?).
Mobs that are transitioned to green-names can have the same % as regular mobs.