My opinion is unpopular considering the ratings and fan following. The biggest downside to this show is the casting. The main protagonist is flat. The crew of of the ship doesn't seem to have any connection.
Season 3 was good actually expected for things to keep the momentum in season 4. Well it was a huge disappointment, just survival more like a TV drama rather than scifi. I think in this season they tried to take an in-depth look at the characters and that just didn't connect.
Season 5 is out and I don't think I will continue.
On a whole all seasons combined I feel that this is how one can turn a good story with so many possibilities fall flat with bad casting, bad acting, Small sets that keep coming over and over.
They should have focused more on the main story rather than focusing on people problems.