I think in the books she gets updates via radio when she is in silo 17. It's been a while since I've read the books though so I may be misremembering. I think there is a lot of story to tell that way for a tv series. Also there's too much for just a single catch up episode.
My feeling is this way is better.
Also Steve Zahn is the perfect Solo. I can't wait to see even more of him now that he's out of the server room.