There are few simple things that can made edge edge much better for navigating.
1) add reverse course option for navigating
2) add navigating to a point without routing - simple bearing line (like on etrex)
3) add possibility to automaticly remove "off track" flag when navigating (now you have to push button)
4) add to automaticly full screen maps when not in navigation mode (two fields with data when on track and those fields are still there when not in navigating but they dont have data).
5) add "last used POIs" in menu for navigation
All these things are in other garmins (like etrex) so those features aren't new.
Best regards!