Complex sentence: As noted above, this piece stands apart from the other, larger scale, works to which Fauré gave the title "nocturne", and would not be listed among them were it not for the publisher's unauthorised use of the title in this case.
Split into simpler sentences: As noted above, this piece stands apart from the larger scale works to which Fauré gave the title "nocturne". It would not be listed among them were it not for the publisher's unauthorised use of the title in this case.