The divine hand of the writer, in both Heroes Season 1 and BSG is pretty heavy. This is one of the places where Babylon 5 did a much better job. Sure there were big chunks of prophesy, but even those were (for the most part) explained.
I think it really helped that Babylon 5 had the major points of the story all worked out prior to any filming ever occurring. The impression I get from the BSG behind the scenes articles is that the show wasn't ever fully fleshed out, and they just wrote it a chunk at a time. Probably explains the major plots left dangling at the end, and direction changes the show had during it's run.
Overall I liked BSG, but I don't see it having as much rewatchability as B5 has for me. It's still a series I plan on buying at some point though for my collection.