I don't know if the copy you reviewed contained the booklet that was in the UK box? There is a comprehensive explanation of the restoration process. It has a commendable amount of technical detail - a rarity from publishers.
The booklet was not included with the SteelBook copy, sadly.
I watched the movie in full last night. I personally did not see any DNR or frozen grain issues. I'm wondering if RAH can point to a scene where he found this problematic?
I thought the movie looked good overall, certainly far better than the smeary Blu-ray from Lionsgate. However, I agree with what Powell&Pressburger said above about the teal-and-orange color makeover. I didn't find it unbearable, but the colors don't look right to me. I'll also say that I didn't find anything "HDR" about the picture in the slightest. The contrast range is rather flat, with shallow blacks and no highlights of any note.
The 5.1 audio sounds very good for the most part, though it's almost completely devoid of bass. This stood out most in the nightclub scene, which should have a thumping bass beat in the music that's totally missing here.
Overall I'm happy with the disc, but I do think more could have been done.