I try to transfer my UI design workflow into Blender and I have one major blocker.
In UI design we overuse the ability to group object and modify/animate the properties of this group like scale/position/rotation and alpha (or opacity).
The only way I found to do this is for opacity is to make controller that control the child individually and that really not the result I need. I need to control the opacity of the group as it's a single object.
Is there a way to do that without going into complex, time consuming and not easily iterative process of a compositing phase ?