It’s tough to get feedback. My stories (ignoring the round robin), have 3 posted reviews, and those stories aren’t short either. I did delete the old first story (that’s being replaced by three) earlier this year, and that IIRC, had 3-4 reviews. And I’ve been on AFF for 2 ½ years. So, to have a one review in a month, that’s better than my average. The one thing I do, and it helps, is I record the hits about every day, and I plot them (libreoffice’s calc), and seeing the consistent jump after posting a chapter/episode does let me know that people are reading, and enjoying it enough to come back for another instalment.
Now, the round robins we’ve been starting to have, in 2015, and I’m pushing on the 2016, are good because they help give you a bit of exposure, perhaps pick up a new reader or two.