I have not re-listened to the live c minor but when I listened to Anderszewski's disc with 1,3,6 I was rather disappointed, in any case I didn't like it very much and certainly far less than I had remembered. I can still agree with "unique and (at least intermittently) interesting". 
When I heard him in concert it was clear that this artist’s core skill is in producing sounds from a modern piano. The colours and the contrast of registers, the weight of the sounds, especially the strong and sweet bass notes that he can coax out of a Steinway, are distinctive and impressive. His art is somehow about the physicality of piano sound.
All that is pretty well lost on that recording of Bach partitas, it may never have been there. So we’re left with something unique and intermittently interesting, as you say.
He may be a one trick pony - the trick being The Diabelli Variations. The rest - Szymanowsky, Mozart, Bach and maybe stuff I’m forgetting - are just at best unique and intermittently interesting.