^^ Yeah, I thought he'd be younger. It was kind of weird that they weren't showing his face for a while in the flashbacks. When we were just getting him from the back or with a bit of profile, I thought he was Nathan or a Nathan lookalike-- like maybe Nathan also had a past identity, same as Audrey.
As for Nathan, I think he's really falling for her and is just being pulled in multiple directions-- he doesn't really know what he's doing either.
Which may not be a bad thing. Each of them were given reasons for their shifts so it's not totally out of the blue.
I don't think you were saying it was a bad thing; I assumed you liked it, too.
You're right, I'm finding it quite interesting and organic. As long as Nathan eventually comes around, I'm good with it.