Controls
The "Archetype is counterintuitive" IO sets can make them fairly sturdy. Incarnates allows them to keep pace with other ATs. An expert Dom is something to behold.
https://archive.paragonwiki.com/wiki/Dominator_Strategy
The Dominator as an Archetype is counterintuitive to play, difficult to master, and relies on mechanics and techniques that are not obvious to many styles of player. Furthermore, the Dominator has a legacy of being underpowered, and suffers in the early game slightly as the game becomes more difficult, often leading to them being considered a 'weak class'. While not as obviously powerful as the other Archetypes in City of Villains, strategic and tactical play can make a significant difference to the play experience.