Yeah, I love BSG, but about half the time I rewatched it I end up just forgetting to continue about when they start working with the cylons. I think they didn't actually know what the plan was when writing the show, and then it just sort of stops.

In my opinion, the show in general just has a very slow steady decline. It starts as some of the best TV I've ever seen, and then they obviously can't just keep doing the same thing and it starts losing it's place I feel.

There was that TV movie called "The Plan", which was basically about the show from the cylons' perspective, and trying to work their actions into a somewhat coherent narrative. But the titular "plan" was essentially just winging it.

The line from the show's intro though, "and they have a plan", that was not something the showrunners originally wanted. The network made them add it in.