Cubase sort of does this with the zoom control. I like how the example graphic looks as well. If it could be added to Cubase, fine, but not at the expense of current zoom controls. In fact, if anything, I still feel I haven’t masted the zoom controls in Cubase but to the degree I have, I like how they work.
If you mean the overview that’s available for the project and audio, I like it too. But it’s not available for the Key Editor.
I might make a feature request for an Overview Line for the Key Editor so it can be shown and manipulated in the same way.