One good thing for the roadmap would be a 'timeline' view of what you created/modified during a given time period.  Evernote v2, for all its faults, had a nice little draggable timeline with little arrows on the date/time where you added/updated items.  This is a good 'journal' type view of what you did, and (for my purposes) is a good report of 'key tasks completed' for things like reporting etc.

 

You could use the gantt control for this or even the calendar control for a more low level view of what items you were editing on a given day (along with a link so you can view the note).

 

On a gantt view you could even have little icons showing events (a tick symbol for when you mark an item as done, a new item icon, etc).

 

The view would be aligned to a grid, and allow you to filter by top level items or include children of x levels, so the view is detailed but not crowded.  Or perhaps it would have filters of its own so only items where Milestone = True would be reported for example.

 

Cheers