I think it's all great, even if every last note of what was in the film still isn't here, not least the prologue music, for which I must admit I've sorely hankered for many a year.
But, at the price, this three disc set is almost worth buying for Disc 3 alone, even if it is new material that wasn't actually part of the OMS. As a complimentary set, it's only a little inferior to the original music ~ the new arrangement of Just One Kiss, Dear is hugely better and more fitting than the original (even though I can't think quite where it might have fitted into the film ~ but then neither did the original, of which no more than the most fleeting few bars featured in the background to some brief bar/cafe scene), whilst Sweet Solitude is sheer magic. I don't care for absolutely everything Vangelis has done (some of it, prior to Chariots Of Fire, is very weird) but, for me, his music for Blade Runner represents pretty well the pinnacle of his career.
Purists may carp (they always do) but, for the rest of us, this is a very welcome augmentation to the original single disc issue. The second disc, consisting of atmospheric themes from various scenes in the movie is also very good; not melodies per se, but highly relevant and evocative, bringing back so many strong memories of the film that you wonder how they didn't seem to be serious omissions from the 1994 OMS. But then we had to wait so long just for that CD that we were thankful for what we got.
Regardless of whether or not you already own the original single album, this new 3 disc set is a steal, both musically and sonically and a very welcome augmentation to the 1994 single disc. Highly recommended.