Do I smell a new CG vocabulary word?
Im not sure how the animation in Spirited Away/Macross Zero/Blood the Last Vampire is better than that in Vampire Hunter D Bloodlust or Ghost in the Shell, but to simplify, Ill compare the animation of feature film animation compared to television animation. Flucuating budgets means the following can differ between feature films as well but to a lesser degree.
Ill substitute the word “Renderness” with quality or aesthetically pleasing to the eyes. Id say the a lot of it depends on the framerates and production time. To save time on smaller productions, like tv shows, animators cut corners to save time and money. They do a lot of single-frame/move-the-camera-around kind of stuff and just animate the lips moving and nothing else. Alot of its also shot on the least number of frames possible to appear like continuous movement, like maybe 4 drawings per second.
Feature films on the other hand, with lots more money and time, can afford to animate the entire character talking, and in turn ACTING, rather than just they lips moving. The animation tends to look better too due to the higher frame rates they can afford to shoot, like 15 drawings per second rather than 8, and sometimes only 2 or 3 like in television.
Big anime films also tend to look better due to the fact that studios have the time and money to render shadows and highlights on objects rather than the more flat single tone colors you see in television shows.