About half the time I use Emergency Burn I don't really need it to last for the whole duration. If I had the ability to shut it down early by pressing my Emergency Burn Hotkey again, returning my fleet to 'standard' burn, it'd be a happy convenience. In this way, I could begin restoring Combat Readiness earlier or quickly reduce my Sensor Profile with much tighter timing, in order to attempt to shake hostiles.
What I'm not suggesting is that the cooldown for E.B. be altered at all - the procedure should still require the same amount of downtime to execute again, whether or not you cancel it early. Could pull some hotshot maneuvers more easily, but not cheese 'micro-burns' that could result from altering the cooldown. I'm pretty sure no-one would want to eat that kind of CR loss without the Industry skill, though. Moot point, anyway.
Thoughts?