Well, in fact there is more music of Rott's which survives and has been committed to disc. A Symphony for String Orchestra and a String Quartet appear on the Acousence label. Neither is as interesting as the Symphony in E Major, however. Curiosities - and attractive in their own right. Both predate the Symphony and the Quartet appears to be a student work.
Rott is "controversial," so to speak, because at age 22 his mind apparently snapped, after some period of mental illness and depression (Rott underwent severe criticism from Brahms). Rott brandished a gun, while on a train journey, and claimed that Brahms had "filled the train with dynamite." The rest of Rott's life played out in a mental institution and he died, aged 25, ostensibly of tuberculosis.