Yeah Seb being more socially confident than previously thought shouldn't change headcanons about him being a sub. Luv sub!Seb but always saw him as also the queen bee of his friend group. Social Dominance and Sexual Dominance are not always the same thing, you know? He seems like the type of sub who is just very generous and a giver
Fictional headcanon time:
not sure I’d’ve labeled him ‘queen bee’ as much as ‘coordinator’ or ‘facilitator,’ but yeah; and it comes out of that desire to please people, which I think makes total sense with that social-organizer skill among friends and also being the kind of sub who’s just awesome at knowing exactly what his Dominant needs and making it happen.
I think what’s changed about my sub!Seb headcanon (in future fic, I mean; I’m not going to change existing stories!) is that I think he’d be way more active making decisions and discussing ideas with Chris. Like, he’s still going to want to please Chris and to give Chris himself, that sweetness and yielding is still there, but if Chris so much as indicates an interest in something, Seb will actively make it happen or talk about compromise to make it work.