Taking away the other Half Cylon, the show added some intrigue to the full Cylon being born to Saul and the 6, as 6 acknowledged the importance of the baby saying, "This means we can survive without resurrection."
There will most certainly be more on this as the show finishes.
Meanwhile, bigger picture, Zarek and Gaeta are planning a revolution, upset with the way things have turned out, and very suspicious as to any further alliance with the rebel Cylons. For those confused as to why Felix is so adamantly anti-Cylon these days, check out the webisodes at SciFi.com.
Ultimately, I think that there are only two ways the show can end. The humans and rebel Cylons end up destroying Cavil's fleet and ultimately decide to resettle Kobal, leading to a future in which the humans head to resettle the 12 colonies and the Cylons head to resettle Earth as the 13th colony (something that was hinted at in the Cylon's price for their technology, they wanted to essentially be the 13th colony), proving once again that all of this has happened before and all of it will happen again. Or, the characters will realize that and somehow break
At least that's how I see it.
Until Next Time, sadly only eight episodes left, but BSG: The Plan (a movie written by the great Jane Espenson and directed by Edward James Olmos) is finished with production and moving into post and Caprica is set to air next season, so at least the universe will