Well, I have a few ideas: 1) the art is 2D, drawn by a single person, so it takes more time than 3D models available; 2) Recently, DC has spent many hours redrawing existing characters, improving their art. While I do love all improvements so far, redrawing something that exists instead of something anew slows down the development 3) the team has become more ambitious; every update has been bigger then the previously. Personally, if this continues, we'll have two updates per year plus one extra. I don't like this.