I hear what you (and Christopher) are saying, but my point is that I think the writers kind of ran out of time because their ratings weren't doing very well (pretty steady downward trend since the series premiere "33") and they cut a lot of storyline corners leaving far too much to the audience to try to noodle out for themselves. Now, mind you, I'm not interested in being spoon-fed all the answers. Some things can certainly be left up to the imagination, but why not delve deeper in the core mysteries that were the underpinnings of the show from the very beginning? It's like they left all the "naturalistic" stuff totally bare bones and in the open, but the more metaphysical aspects that drove the current and motivations of damn near all the characters were pretty much set aside and not given much in the way of additional fleshing out.
In TOS, we didn't know who/what the Beings of Light really were, but we didn't need to because we had a clear sense that they had a hand in the bigger picture of what was going on in the world. We understood their motivation, especially when we were introduced to "John" (played by Edward Mulhare) who provided us with even more information about their mission and how the Colonials were a part of it. We also had Count Iblis, a creature of immeasurable evil who was likely responsible for the evolution of the original reptilian Cylons into cybernetic creatures (hence the intentional usage of Patrick MacNee's voice in the Imperious Leader), who was clearly not keeping the Colonials' interests at heart. We understood his motivation. There was a clear sense that there was a "grand chess game" being played by these beings on a cosmic/ethereal level, while the Cylons and Colonials were mere pawns in that game. Incidentally - that's one of the more interesting things that happened in Babylon 5, in the war between the Shadows and the Vorlons, with the humans and other younger alien races getting caught in the middle. THAT show did it right. Ultimately, we never really knew what they were, but we were shown enough to get a good idea of what was going on in the bigger picture. TOS BSG started doing this as well and likely would have done more had the network suits not meddled in its production so severely before dying such a premature death. NuBSG started up with promise but then quickly muddied it up and cast many things aside without really giving us a sense of what was going on at the "macro" level. I guess that's my biggest problem with it. It was too "micro". A series of such an epic scope should be more "macro", if that makes any sense.
Oh, well. A new one's coming (hopefully). Let's see what they make of it. Either way, I'm guaranteed to see it, so come what may!