Velocity curves option for graph editor

Often times when I find myself wanting to edit animation curves in the graph editor, but running into a problem where if an object is animated along two axis at once, the curves can be very finicky and not produce the indeed straight line.

EX: I want a camera to move up and to the left at the same time in a straight line, but I want it to have custom easing. If the curves aren't perfectly tweaked, then the camera will move in a curved path instead of straight.

In After effects there is a feature called "Velocity Curves," along side normal curves, which look a bit then what most people are used to but specifically lets the user control the velocity between two key-frames, instead of the position like normal curves do. It also handles keyframes "As a whole," instead of separating them by Axis, so it makes the above mentioned problem disappear.

On the technical side it seems like this wouldn't be too involved to do as nothing new would need to be saved. All the velocity information is already there and just needs to be calculated based on the current curve then is displayed in the new tab. Once the velocity is edited, that information could then just be saved back to the original curves.