It may have simply been a general dislike of how it felt and an underwhelming response to the images, rather than anything definite.
That was my feeling as well; underwhelming sharpness. I also felt it didn't have any purpose; the 12-xx zooms covered that range, as does the 7-14 and 8-18. And if you only needed it because it was a good travel pancake lens, the 20mm f/1.7 is much better image quality (IMO) with a more useful (also IMO) focal length. So yeah, the 14mm f/2.5 was the first lens I ever sold.