Haha, thanks for all the kind words. 
There actually IS an eraser animation when units fade out! The stuff doesn’t fade out everywhere at the same rate, I wanted to create the illusion that somebody needs to go over stuff multiple times to fully remove it. You can see that for example on the shot in the gif where the red building gets jarred (with the Bob Ross drawing and drawn on the background).
But actually, not a lot of people are realising this. So I plan to do it a little more obvious, but I hadn’t really time to do it yet. Another idea that goes in a similiar direction is to let some very small parts stay for some time when something fades out, as it wouldn’t have been erased fully.
Edit: Bonus, some random gifs, taken from my twitter:
http://i.imgur./fyGdDfy.gif
http://i.imgur./wqg91Z0.gif