... if you could directly CTRL+C activities from one project and CTRL+V to other project?
That would save many clicks.
... if you had one Formula Bar like the one in Excel?
In that way, When positioning over a 5-Width cell you could see the complete description without having to change the information panel's size each time you wanted to see more Gantt. http://www.screenr.com/Lrw [1]
... if you could compare more than one schedule to the current project?
In that way you could have just one screen with As Planned vs As Built vs Claimed; or Last month update Vs Current plan Vs Original Plan