Just finished watching again, hadn't gone through for a few years. First thing to note is I was surprised again by how bad Train Job is in terms of production values compared to the rest of them.
But as we finished, I started to think, maybe the best way forward for the show would be to start it over as a prestige show somewhere. I'd recommend Apple TV, since they have done great work on sci-fi shows already.
We got one season that is about the equal to a prestige TV show's seasons, so it's not like changing to that format would cost anything. The big question is whether anyone would want a reboot, or whether it was more lightning in a bottle with the actors in the original. I think the show itself is strong enough to restart it with new people.
I could see making room for the old actors. Fillion could be great appearing from time to time as Badger, Tudyk can be any kind of robot that might come up, Baccarin could be higher companion other than Inara they meet at some point, Glau could be an enemy fighter, and so on. If they had to have someone from the original carry over in the same role, I'd say Baldwin as Jayne, because I can't think of a point where his age matters, and it might be better if he was a more used up brute they picked up.
Would anyone else be interested, or is the general consensus that it should be picked up with the same cast or left alone?