Darth Bizarro said:
While I don't think it's fair to compare Empire to the prequels, as far as I'm concerned, it was the same line of thought that produced both.
Flawed thinking, imo.
There would've been nothing wrong with the prequels, had they been as good as ESB.
Blaming ESB for the whackjob they did with the prequels, is almost bordering on insane troll logic.
Aside from that, you said it yourself - it was conceived as (and modeled after) serials and comics, and Flash Gordon had on-going storylines throughout its "episodes" as well.
So what would've stopped them from going back and filming the story arc that was ALREADY MENTIONED IN THE FIRST FILM? ANH already introduced the backstory element, Empire only added the "father" part to it.
We can all wonder what would happen if they made the sequels in the same tone with stand-alone plots, and compare it to other film series such as Rush Hour or Fantomas (just to name a few), and if maybe it could've been better, but naming the prequels that followed 20 years after as an argument... is simply ludicrous.