This is not so much re. a new feature but rather a cry for the old one...
Traffic History is a nice little widget which many of us regularly use. Before FortiOS 5.X inbound and outbound traffic for an interface overlapped on the same reference frame, which was nice: In and Out traffic were drawn with different colors, scale was twice as higher (in comparison to what we see starting from v5.X: In and Out traffic are now drawn on their own frame of axis), you could have detached widget into a separate window for improved visibility or printing purposes and it was much easier to correlate inbound and outbound traffic.
Traffic History widget' s implementation in 5.X is not as good as it used to be. It would be nice to get old one back.