I mean, the office team has also said that there were things about Office that just don't work with the Modern UI (now).  On a desktop or laptop there's just no way I'm going to be using Office in a Metro app.  The "emmersive" experience irritates me when I want multiple things displayed at the same time (and pinning at this point just doesn't work well for that in a lot of cases).  What doesn't annoy me on a tablet does on a desktop and that's what I use pretty much all day.