I saw it a while ago. It's interesting for the first ten seconds while you think "Wow! A Chopin fugue!". But when that's over, it's no big deal.The first abandoned Chopin work that deserves revival is the first sonata.
Defintely a very interesting work. I read somewhere that the fugue was a result of Chopin taking lessons in Countpoint rather late in his career (he of course studied CounterPoint with Elsner at the Conservatory as well). Some Professor's decided that the fugue was more an attempt to write a fugue than a finished composition.Though it to me feels very finished.Perhaps I record it one day and put it up on https://pianosociety.com