Observation:
After having run some quests in groups today (Heroic Elite) the champions are much worse with scaling.
I have a much easier time of it when running solo.
I will repeat: in my experience with it so far, it is now much easier to solo heroic elite than to run heroic elite in a group. This is the opposite effect from what many desire.
I will cope with it one way or the other, I just thought it might be important to point that out.