Optimum strikes again I see. They filtered and wiped the film grain from their Ghibli DVD releases as well, some of which
looked terrible in comparison to the Disney versions.
Really glad I didn't take a chance on the UK Nausicaa now, as I would only have ended up trying to get rid of it at a loss, just like Optimum's Ponyo (which I sold because of the stupid decision to not include both video angles, as well as the ugly yellow subtitles, and some very slight compression issues in the first chapter.)
But at least I can completely rule out collecting the UK Ghiblis now, it's either the US (if Disney can ever get their thumbs out and announce Nausicaa) or JP editions (horribly expensive, but guaranteed to get the best version, and guaranteed to get all the movies, most notably Grave of the Fireflies which Disney doesn't have the US rights to.)
By the way, Nausicaa was a 6K scan, which is probably why the grain looks so good. I really hope they'll do 6K scans of all the (film/cel) movies, but I guess we'll see what happens with Laputa in a month or so.