For a show that has done very little hand holding to date, holding the viewers' hands a bit while laying out who Doctor Manhattan is and how he works before detailing how he's been among the rest of the show the whole time was important. And it was artfully done.
Hey, Doc Manhattan and Angela met in Mr Eddy's Bar in Saigon.
That's a callback to VVN day with the Comedian.
Also how the title is how he walks into (Angela) Abar, not a bar like you'd expect in the joke setup.