The good news is the companions don't get randomly obliterated this time, so you can still see all their stories despite not playing as them.
But Tav himself... I feel like when Larian said custom origins would have more content, they were talking about the Dark Urge, but later decided to split it off from Tav. Though I hope I'm wrong and Tav gets something that's wholly his own too, even if it's just a little bit.
