I use the film view as a training tool and here are a few ideas that would improve its usefulness.
1. Different color trails for aircraft (user selectable, either friendly/enemy (2 color) or per plane (8 color))
2. Adjustable length of trail.
3. User selectable icon information (airspeed, altitude, G-Load)
4. Variable trail colors based on a parameter (airspeed, or G-Load)