I admit I'm a bit optimistic in assuming that anyone where has watched it.

I enjoyed the first part (admittedly as a captive audience on a plane), but I did notice how they made the Fremen, who speak Arabic, half-black and half-Arab. Apparently, the Fremen are yuge racists who don't interbreed with the blacks among them, or if they had, all of them would be a mix of the two. But there was a clear dividing line between them, as if there's been segregation for centuries.