Format Painter is a tool on the ASP.NET Ajax version of the editor - I would really like to see this ported to the Kendo UI and MVC versions of the same control.
As mentioned below, with the release of R1 2020 the Kendo UI Editor has a built-in format painter tool!
I'll go ahead and mark this item as completed.
The Format Painter tool is in our plans for R1 2020, which will drop in January 2020. We will keep this thread up-to-date when we have officially released this feature!
sounds like a good idea