I think it's great when making small adjustments to, say, a velocity envelope (without having to make the track wider) by pressing the CTRL key while dragging the line up and down is excellent. Not sure with which version that came into play but I only recently found out about it.

How about adding that to adjusting the length of a fade? Currently, if I want to make a small (or exact) adjustment I have to zoom into the timeline, adjust, then zoom out.