Agreed that POF is not one of the better "parallel earth" stories, not least due to the forced reasoning behind the setup. I take your point about HHOh, I know it wasn't supposed to be funny. It's sad when a sitcom revisiting the same events (and probably costumes and set props too, something as common as that gear would more likely be rented from a central source) is better; Trek is handling the themes so hamfistedly bad that it's beyond a joke (not unlike many "parallel earth development" outings), and IMHO Hogan's Heroes wasn't exactly a go-to show for laughs either. Or, rather, it's not all dated well - nothing does, but HH was popular back in the day... But I'd rather try to laugh with any HH episode than at PoF for its by-the-numbers 50 minutes.
And yet so many are always quick to say "The Way to Eden is the worst episode!" when it really isn't. That might make for an interesting TOS post, where people can compare two episodes - one deemed bad and one deemed forgettable or "just there" and ask which one is truly worse compared to conventional fandom.
APotA definitely was made for laughs in mind. It's not my favorite, but it's still more honed as a story - which also shared a similar theme and aired a mere 4 weeks earlier. TOS often reused themes, which weren't always successful...

APOTA may not be the best overall episode of TOS, but it is the most successful of the 2 deliberately comedic episodes of S2, at least IMO

I think you are forgetting his almost certain intention to murder the entire crew of the Enterprise:He was not a mass murderer, he was not aware the fruits were poisonous until it was too late. He did not plan to murder anyone.
IRINA: What will that do to them? What is it?
SEVRIN: Well, I'm using sound against them, beyond the ultrasonic. It will stun them and allow us time to leave. We'll go in one of their shuttlecraft.
IRINA: Sound pitched that high doesn't stun, it destroys. I remember when we read in the text that it
SEVRIN: I've gone beyond those texts, Irina. It's correct for you to be concerned, but be assured also.
RAD: We are in orbit over Eden, Brother Sevrin. It does destroy.
SEVRIN: We cannot allow them to come after us. It will not reach us in here. I can control it all. I have adjusted it so that it will suspend its effects after a few moments and allow us time to escape. Then, after we've gone, it will automatically reactivate. Rejoice, brethren. Soon we shall step together into Eden.
SEVRIN: Well, I'm using sound against them, beyond the ultrasonic. It will stun them and allow us time to leave. We'll go in one of their shuttlecraft.
IRINA: Sound pitched that high doesn't stun, it destroys. I remember when we read in the text that it
SEVRIN: I've gone beyond those texts, Irina. It's correct for you to be concerned, but be assured also.
RAD: We are in orbit over Eden, Brother Sevrin. It does destroy.
SEVRIN: We cannot allow them to come after us. It will not reach us in here. I can control it all. I have adjusted it so that it will suspend its effects after a few moments and allow us time to escape. Then, after we've gone, it will automatically reactivate. Rejoice, brethren. Soon we shall step together into Eden.