Unlock Animation Keyframe Tangent Length?

As far as I can tell, there is currently no functionality that allows for 'bezier-eque' tangent strength editing.

When creating an animation in the animation window, you have all the normal options (free,flat etc), as well as tangent types (linear etc), but no allowance for changing tangent strength - this leads to limited easing options.

So far the only solution is manual easing with more than 2 keys, which is a huge amount more work when you are working with many animations.

Has anyone found a solution/workaround for this? If not, might it be in the Unity roadmap, as so far it's very limiting.

Cheers.