An example of Sanzigen's work:
An example of Kamikaze Douga's work:
Looking at Kamikaze Douga's work in particular, they use CGI technology to add texture to their rigged models. And they use traditional FX animation to provide some visual variety. Sanzigen uses the great Pencil+ plugin for 3DS Max to be able to explore a range of styles with lines and shadows that stay visually consistent and appealing. It's light-years away from the toon shader in Maya. The team that programmed Pencil+ made sure that it attempts to capture good shape design in the shadows. It adds a sense of intention to the CGI "drawings" that computer animation usually lacks.
One thing I don't understand though is why the recent series "Knights of Sidonia" and "Ronia the Robber" are being done in CGI. Both have relatively simple character designs and would look much more appealing if they were drawn. And neither series is taking advantage of the Pencil+ plugin, so shadows sometimes get that jagged, unintentional look, making the jerkiness of the animation seem like a mistake. I wish the studio, Polygon Pictures, would at least get the Pencil+ plugin, but it won't fit in their pipeline unless they're using 3DS Max.
Here's an example of an ideal form of CGI/cell-shading. This Gobelins short uses texture combined with hard and soft shadows and great art direction for a distinctive look. Plus a really funny script.