Purists often irritate me, not only in music but in other things as well.
How they can slam Cameron for being somewhat flashy (personally I don't think he is based on the videos that I've seen) & not playing those pieces exactly the way that the composer intended?
How do they know how the composer would have performed them? The masters have been gone for centuries & there are no recordings of the original works. I give credit to any artist who does their own thing, within reason of course.
Look what Eric Clapton did with Robert Johnson's wonderful blues compositions from the 1930s. Listen to RJ's original acoustic recordings then EC's modern electric adaptations. Although I appreciate RJ's original performances, I know what I prefer to listen to...
not only the composers have long been dead, but since then, the instruments have evolved, as also mentality and tastes.