'There is nothing more...', together with 'sophomoric', which means pretentious and immature, indicates that the writer of the paragraph does not much care for the album.
Perhaps there is nothing more to the album than its case that experimentalism into uncharted sonic landscapes did not die/stop/end with Stockhauen.
这句话应该是说:已经没St的唱片什么事了,但St的唱片所相关的那种搞实验音乐还很兴盛的情况还有。
“nothing more”否定album;“than”肯定case还存在
不知道这么理解对不对。