I like 3 a lot.
Still agree 23 minute weekly drops doesn't seem to fit the story they are telling, but I think the larger narrative is becoming clear.
I think the visual humor suited the 70s well (the forced allusion of water breaking... they are definitely showing the format of sitcoms over the ages a lot of deference), and I think they are doing a great job with the dialects you can hear them slightly changing with the time.
Big Future Spoiler I accidentally saw on the cast list