It depends on what they are going to let me do with him. If he has a household in the panel and editing him doesn't generate a new Greg, he's probably becoming my werewolf version of Straud. Aka, my go to parent for the new Sims I design.
If his position is as fickle as the sages'... Depends. Depends completely on what I can get away with without eroding that aspect from my game.
More generally, I really like Greg. He's the type of character that gets my brain firing and I want to interact with him. I hope he isn't arbitrarily excluded from systems such as fated mates, but I already have issues with that RNG as well.