I love the show, mainly love the universe they created, and love the fact someone dared to bring some hard scifi into tv in a time when there is almost no scifi of any kind at all.
However when I think about it with a cool head, I realize the show has been mostly living off it's excellent first 2 seasons. Season 3 was dull, season 4 had it's moments (mostly Amos and especially Drummer and Ashford - great duo) but still a bit "meh", and this 5th season started great, but like you said it's like we've been watching a very long episode 3 for the past 5 episodes

Naomi, Marco and their son subplot, sprinkled with Amos trekking the woods, just isn't interesting enough to support an entire season.