But you're forgetting the ribbon and all the stuff in there and it's hierarchy and organization. I can't see all, or even some of those ribbon tools, in a Modern application. And having a "dumbed down" version of an office application as a Modern app would send a message about complex applications moving to the new UI. You're going to dumb down Word for Windows Store to be a glorified Notepad?
Office - The WordPad Edition ?? LOL