Here's a nit. The cooling suit that Scorpius wears (and Aeryn wears in one ep) is black.

Black outfits tend to make the wearer hotter, as they absorb external radiation. The cooling suit should be white. (But then it wouldn't look as cool )

That's a nit that I apply to the stillsuits in the Lynch version of Dune. I've heard people say that the Miniseries one looks bad, but its lighter coloured and has a face mask and head covering.