Vraegar may have lost most of his powers as a Scion of Darkness, yet, he was not displeased by this new form, far from it. The sheer power that he could feel flowing in his veins was intoxicating and different from anything he had ever known because there was a factor inside his body he had never felt before, it was endless potential.
Rowan had never known the feeling of having a shackle when he was ascending, he simply broke through every single power levels with no indication that there was any barrier stopping him, but that was not the same thing for every other creature, including someone like Fury.
There was always a shackle holding back an individual who wished to grow more powerful, and depending on each person, it may be as easy as piercing through a water bubble or breaking through a mountain, in simpler terms, it was the potential of an individual.