Timeline keyframe returns to the default value by double-clicking.
It will be useful to work with keyframe in the timeline especially with audio.
Franklin Nin commented
Jim Simon, Sony Vegas has this feature, not even a frustration working with this feature, also Premiere have already used if not all, almost all key modifier to work with keyframe.
In addition, to make a mistake by double clicking on a keyframe must be a faulty mouse.
Jim Simon commented
Using a Modifyer key might be the better solution. I can imagine a whole lot of folks getting frustrated with an accidental double click.