For my part, I'm hoping Diaspora steers away from the Watchtower/God's plan/Starbuck-is-a-magic-angel aspects of the series. Sure, season 3 wasn't as strong as previous efforts, but it didn't really jump the shark IMO until All Along the Watchtower. Here is this group desperately struggling to survive where things look like they've finally reached a breaking point and oh, the only important character to die off so far just came back to life, and is that a cover of an extremely popular cover of a Bob Dylan song? Totally took me out of it, and I don't think they ever really recovered.
On the other hand, maybe if you do a cover of the cover of the cover of the tune it will turn out brilliant, like with even numbered Star Trek sequels.