What is the feature?
When resizing an element to the right, allow users to easily see where they are resizing to.
This could be done by applying transparency to the customization panel, hiding it entirely, or moving it somewhere else.
What problem does this solve for you?
Resizing to the right often has to be done in multiple steps because the customization panel hides the dragged item.
On this screenshot for example, I am currently resizing something to take the full length of the screen. The collection customization panel hides where the right border of the dragged item is.
Who else would be using this feature?
Anyone using workspaces and wanting those sharp layouts.