It's almost impossible to work with a roadmap that has more than a few swim lanes or extends over a large date range.  Adding new bars or markers and then moving around the edit pane to get them to where they need to be is painful.  People in my company love the look of these roadmaps but struggle to edit them and often move to other tools instead.  

Full screen editing plus a bit more flexibility on setting the display width (see numerous overlapping suggestions) would be AMAZING.

Also perhaps a statement on the future of this macro.  Any space for improvements to it on your roadmap?