I like this show, but I'm starting to agree with some of the criticism.  I think there should be a lot more species/alien variety.  The 4th episode was particularly disappointing since that tribe they saved was a good opportunity to make them a new species, but instead they were all just human.  Also, while I like some of the wild west theme, I think it would be good to show some other settings, such as a major urban setting, instead of just these backwater nothing towns.  These planets are all part of a galaxy where interstellar travel is commonplace.  Not everything should be some crappy settlement.  I know he's trying to lay low, but plenty of people can disappear in a big, crowded urban setting.  Plus, there's a lot of potential story lines from various settings.  It's still a very good show IMO, but there's room for improvement.  We are 4 episodes in at this point so I thought some of these things would have been a part of it by now, especially the larger variety of aliens.