Hey Starman, welcome! (Is "Starman" a Bowie reference or a movie reference?)
I don't know what's worse when it comes to commenting on the episodes, the squee fan delusions or the actors delusions. I can only assume that the SGU actors in question don't actually watch the episodes when they air and are just squeeing about how cool it was to be on location for filming whatever episode and how they got to run around in some British Columbian forest and eat free donuts between takes. Surely their positive comments can't be in reference to the dreck that we, the humble viewers, actually see as the end result.
You're right, total filler episode last night, but much of the show itself is filler and the rest seems to be made up of derivative (read: stolen) characters and story lines. Much of what happens (when anything happens) on SGU has been done before -- and done much better. I don't think it's necessarily bad for a show to be influenced by other shows and even borrow stories that have been done before, but the onus is then on that new shows producers to make that old, used story/character different and new in some way. SGU doesn't seem to be doing that, in fact, they seem to be making those old, used stories/characters only worse. They've even managed to make the stolen, dark, "gritty" style of the show worse than its predecessors (BSG).
I'm sure SGU will die long before anyone could even think of doing a recast -- and even if they recast the actors that wouldn't change anything if the same writers/producers were still churning out boring, uninteresting crap. There would have to be a recast from the front office on down.