I'm not sure I'd like that. There were only a couple of seasons before the very late '90s that I thought were all that good. The shows have gotten much richer since then. On the other hand, one of my favorite seasons with Naruhisa Arakawa as head writer was Dekaranger, which was basically done in the style of a '70s cop show, far more episodic than usual for Heisei-era Sentai, without even a single main villain group. So even a fairly basic formula can be done well with good character writing.