You're forgetting a few:
Androids/Robots/Cyborgs: Pelinal (in theory, though we know for sure that that's the authorial intent), Fabricants, Sotha Sil. And honestly, I'm not at sure why androids seem implausible but robots don't. It's the same principle at work, and they come from the same genre.
Time Travel: We know for a fact that Pelinal is "From the Future Time" and seems to have bounced around different periods. ESO's plot, from what I've heard, ends with the player being moved back in time, and it's strongly hinted that time travel plays a major role in the (hypothesized, but seemingly very likely) Soulburst Dragonbreak.
Also, again, MK created the Thalmor. I have no idea if Bethesda is using all of his original ideas for them (though I'd be surprised if they weren't--from what I understand, he, Kurt Kuhlmann, and Lawrence Schick are all close friends), but suggesting that he "bases his theories off a whole lot of nothing" is flat-out wrong.
(Oh, and for what it's worth, this line has always seemed like a nod to the Altmeri Commentary on Talos. Make of it what you will, I suppose).
I personally feel like the politics and metaphysics are so closely intertwined that it's hard to have one without the other, but I totally get you. For what it's worth, I tend to focus more on the cultural implications of it than anything else; like what their religion and belief say about them as people, rather than just the beliefs in-and-of themselves. But yeah, it's all good.