Not many players know or think of how how much time it takes to make static images or animations. Let's say, an update has 10 new animations. At the moment, each animation takes 1 day to be made and rendered. Simple animation, but still takes 1 day. So it's 10 days already taken by animations. 20 days left to make static images, write a script, do proofreading, make a build, test it and make a release. Do you get the idea? If the animations were more complex, they alone would take 3-4 weeks. This way releases couldn't be made monthly.
The same as above. I would like to make them more complex, but for monthly releases it's unreal.
I guess it's a bit late to add a sister to the game.