Annoyed at season 6 episode 3

I'm annoyed at the large plot hole in beyond the sea; why wouldn't you send the replicas to space instead of the humans. I have heard the argument "what if something goes wrong and the link is lost?" But the benefits of sending replicas is WAY larger than possibly losing the link. First and foremost, you wouldn't need any life support and could build an extremely robust spaceship without life support.

But I'm not here because the episode directly annoyed me, however, I'm annoyed that this episode is consistently ranked as either the best or second best of the season. How? It's not thought provoking or unique. I assumed the Ross character was going to snap and kill someone as soon as his family was killed. I suppose I didn't know who he was going to kill until the final scene, however it wasn't very suspenseful and the story telling to get to the end was incredibly slow and boring.

Does anyone agree? Anyone disagree? Why do you think the episode is great if you don't agree?