Right now we can display the trajectory of an animated object, but it is a "read only" state.
Would be amazing to be able to select keys directly in the viewport, and move them in 3d.
For instance, you could select the last 3 keys of you ranimation, et move their positions like you would do with any other objects.
Ajusting velocity for each key would be a huge bonus!
A script got it quite right, but I would like a more robust and built in solution:
http://www.jdbgraphics.nl/pro-trajectory-handles