This discussion may contain spoilers!
I've seen a number of people who talk as if everyone going with Tavia at the end is the clear-cut 'good' thing and that if someone chooses not to go you've messed up somehow, which means metagaming things so that you get all of them.
I really hope TT subverts this assumption by having any 400 days characters they intended to be in Season 2 show up regardless of which route you took. So if Shel and Becca went with Tavia, then you'll encounter them in the survival community. If you don't, then you end up encountering them elsewhere in the wilderness, with corresponding changes in dialogue and circumstance.
My first playthrough of 400 days? Only Bonnie accompanied Tavia. I lost everyone else. And if the game makes me feel like I'm being punished for that, when the reasons why the 400 survivors accompanied her were often so random and arbitrary and unpredictable, then I have to admit I'll find it pretty annoying.