I believe he is implying that an individual episode can contain both filler and plot advancement, the same way a burger contains different ingredients.

It doesn't prevent it from being an oxymoron, though.

I always knew lettuce was filler!

True, if you're talking about a single, indivisble thing. However an episode can contain both filler scenes and plot advanceing scenes. So while KyoryuBlue's original statement of 'plot-oriented filler' is in and of itself an oxymoron, an episode containing both is not out of the question.

And I kinda agree that this episode is kinda filler-y for the adult watchers. It seemed to mostly be about explicitly stating for the younger viewers and in-show characters all the implications about Kouta's transformation we already picked up on. At least for me there weren't any big reveals or suprises, just a whole bunch of "yeah, I figured as much" moments.

You and me both brother.

I know Kouta can't eat human food anymore, I'm saying the way he would run Helheim as implied by the show would end up destroying him.

Roshuo made it seem even more dire then that, making it sound like it was natural to allow the forest to grow, and that all a "king" should do is force his people to adapt to it. Sagara and the recent Gaim Movie imply that Roshuo's world is not the first to be consumed, and Takatora says it's just an organism that needs to reproduce and survive. If Kouta stops its take over of his world, and likely will do the same if it tries to open cracks into another alternate world, what starts to happen to the forest. If we're going to start assuming things, it's not that far-fetched to assume Kouta is not just going to be ousted by mankind, but will literally have a shrinking world closing in on him because he's too nice to allow Helheim to start taking over another world after failing to take his.

You can only trust the illusion's interpretation of possible events so much, because A.) Redyue crafted it to break Kouta, so there are exaggerations like Zach being that much of a douche to just turn on Kouta, and B.) Being a Byakko Invess instead of a greater Overlord one, for no other reasons than because it helps with the dark reflection imagery and it allows the Four Gods Inves to be together on screen (in case no one else got that, Seiryu, Genbu, Vermillion, and Byakko were all together this episode). Redyue is a sadist, so it wouldn't necessarily be that bad.

What I'm trying to say is prior to this episode, neither the show or Kouta himself made becoming an Overlord extremely awful, as he could technically bike over to Helheim, grab a fruit, eat, and return to Zawame if everything goes well (it's an Urobuchi work, I know, but I doubt Toei will let him go completely amok). This episode shattered the illusion that his ending would be as nice as Blade's, because Kenzaki just has to move out of Japan, at the very most (the city he inhabits at least). Kouta would have to move to an Eldritch location, of which unlike the last rulers he'd have to constantly keep it from invading other realms and would be effectively doing it alone. Kenzaki could make new friends in the next place he stopped, but unless Kouta convinces Kaito to be his friend by the end, Kouta is going to be doing this by his lonesome. The last few episode have shown him getting a bunch of his past enemies to team up with him, and this one episode shows that was just a temporary happiness. And this is all just assuming that keeping Helheim from doing what comes naturally won't stave it, and in turn, eventually starve Kouta when it can't bear anymore fruit for him to eat, either with his driver or naturally since he'd be an Overlord at that point.

That is fantastic. You would then agree, that in the hamburger, the main focus is usually the patties?

I absolutely love the fact that when Kaito walks into a room where helpless people are hooked up to an alien machine, his first and only instinct is to kick it really hard and hope something good happens.

Even more than that, I love how two different sets of people came through trying to figure out how to remove the people from the machine, and Kaito just fixes it with a kick.

All that's missing are the "Calm the F down, I got this!" memes.