Seveneves was excellent, but Stephenson is pretty much my favorite author. It certainly redeemed the relatively weak
Reamde. I liked the second part just as much as the first, and almost more because I loathed some of the initial characters... I was significantly affected by the events in the first part (trying to no spoil stuff here) and nearly reached depression when...
They were in orbit after the end of the earth, and I told my wife "I don't know where he got this title from, it must be a reference to the animals who were brought back from having seven female examples. There's XXXX people in orbit now, how could they get down to seven?"
Well, then they went and did it. Just sad at how human it was. People suck.
It really could be set up for a number of sequels or parallel books of the other groups' experiences.