One very important feature for the NavigationView would be to be able to hide the Navigation bar on certain cards.
For now, the navigation bar is global and unique so if you hide it for one card, you have to re enable it when you need it on other cards. This also causes a problem on animation Navbar appears or hides, then the animation occurs.
Lots of people will want to hide the navbar on the first navigation view, to be able to use the whole card to put a cool logo or catchy graphics (like for example http://bgolf.us/ ), but then would need it at least for the "back" button.
Is their any plan on doing this ?