After having now watched all six episodes, I will say that this series accomplished a lot.
These other spinoffs were fun, but there wasn't any big conclusion. The Ones Who Live, to be fair, had a lot at its disposal to work with since, unlike the other shows, the CRM is a large aspect. This clearly gives the series an immediate leg up.
Of course, we also see the return of Rick Grimes. I thought he was rusty in the first episode, but he hit stride soon thereafter and it definitely felt like you had Rick back in the mix - albeit a more, at times, jaded or damaged version of himself.
I thought this series was to be more of a love story, perhaps I misunderstood, but it was still plenty of action. It definitely felt like they wanted this series to be special and to make a statement with it and I think they did. Certain longstanding loose ends or unanswered questions are tied up with closure in this series and therefore really gives back to the fanbase.
This is a very cinematic series. The spinoffs were good enough, but Rick is just a better actor and is the heart of the show having been the originating character. It's a shame he ever left the show, but kudos to him for being willing to come back years later and put this together.
Overall, I enjoyed the series. The CRM aspect enabled the show to do a lot of new things. Matthew Jeffers was a great addition and I thought he really improved the show. Terry O'Quinn was a strong choice for his role, too. The Ones Who Live is kind of a bittersweet ride. You realize how much time has passed since the inception of The Walking Dead and all that has been endured. Although we get Rick back, he's not the same Rick. This series sometimes feels like this Rick is a totally new character. It's interesting. I rate The Ones Who Live a 9.3/10.