I think the Blasters were just a one-episode plot device in regards to the radiation zone from the bomb(s). The writers were definitely modeling the style of that particular episode on the Road Warrior movies and the Fallout video games (and maybe Borderlands). It was something of a pastiche you could say.
And so far they've managed to keep the pot references comical. Hopefully they won't overdo them to the point that it gets tedious. Granted, next weeks episode looks like it's all about pot, but with luck it will be funny and advance the story.
I am convinced that the writers (and also Craig Engler himself) are vaping some killer bud when they come up with the stuff in this show! They probably walk around the props, talk (and share the pot) with the cast, then it goes to print.
It is fun watching the show high too.
The characters that are left are all so good, they cannot kill any of them off without throwing the balance off...except the new mercenary guy. I don't miss Max. I do miss Charlie, but with him gone, Roberta gets to shine brightly. This show is so damned good, mostly because it does what a show should...it entertains.