I think the writer had created a Twin Peaks-esque teen drama script, when a producer mentioned doing an Archie series, so he went through his script changing names and maybe adding a few Archie characters after the fact.
Few, if any, of the characters seem like their comic alter egos. Jughead feels like he was added after the decision to make it an Archie project. The relationship between Archie and Miss Grundy was beyond wrong and gave me the mental image of the comic book versions re-enacting the Volkswagon scene. And for that matter, it seems like the actress playing Grundy is younger than the actor playing Archie.
I believe this is the first "adaptation" that has a live action version of Jason Blossom and he gets killed in the first ep. *rolls eyes* I haven't read that many stories with the character, but is he really such a dispicable character that no less than three writers have felt the need to off him? (Archie vs. Predator, Afterlife With Archie, & now Riverdale)