>They have completely neutered Doom
He achieved enough power to wow the world by torturing every man, woman, and child in Latveria, using their souls as fuel for his magic.
>He's lost his theatricality
He shows up riding his alternate-reality-Dinosaur self.
>His pettiness is gone
He took away Ben's powers permanently so he could go "yeah, that's right, I did ANOTHER thing Reed could never do."