I already left my 2¢ on the WPcom News Blog. It's distracting, it interferes with our site layouts and as far as editing, that's what the New Dash is all about. We're being redirected more and more to the New Dash. For someone who still prefers working with the Classic Editor interface, it's getting even harder to do so. Carry it further, even the WPcom Support docs are doubled up to include both interfaces. Well, that ended up being my 5¢ worth. :)