The person who works on animations is not the person who works on the text (me). We've also added fewer animations as late, as Alis has been trying to increase the quantity of new art while also taking time to work on UI stuff whenever she can. We have a backlog of the idle animations that have won the surveys (Cultist, Wasp, Naga, Ettin), and once those are completed, we'll basically have animated all the characters, so we're going to add sex animations to the surveys instead.
Of course, neither the quality of new text nor the amount has changed. I've actually liked some of my more recent work more than I did the work that was done in the middle of last year (the new Lupa and Giantess stuff is great, the Brothel Madame endings and other new scenes, and the Dark Knight story mode stuff as well). There are fewer new features, since the game is more feature complete now, and the remaining features are the most complex and difficult, so they take more time. And there are fewer new characters (read: none, it's been frozen since Dark Knight last year), because people complained about the lack of content for existing characters - of course, now when we focus on content for existing characters, people complain. If I add a large amount of new text all at once, like I did for the Mouth Fiend or Dark Knight because I enjoyed writing those encounters, people complain that the update is all text and no new "content" (ie, art). The one constant is that people complain.