Really, what was it?
This character is truly a pathetic loser and nothing else. He exists to job to Sylvanas or the Jailer. That's been his entire role in Shadowlands and soon enough he'll likely be supplanted by Arthas in the later patches and tossed aside.
In the latest raid, one of the cutscenes has him getting punked by Sylvanas again. Effortlessly:
https://streamable.com/poc4mn
What is the payoff for this character? Literally why does he continue to exist? Just kill him. The only interesting thing for this character would have to been to have him go evil and do a Scourge 2.0 theme with a twist, but that did not happen. This character needs no redemption morally, he's not tied to any important lore characters. Why is he the main quest-giver character a la Khadgar?
He's just so pointless.