The current speedmeter works only on how fast u r spinning,what if this will be active for each joint.
For example u can type in the chat /sm rknee or /sm lshoulder (l=left r=right).
This is useful for seeing how fast ur leg or arm is while kicking or punching too.

For what we need that information?
We see with our eyes the speed, we don't need the exactly speed of the joints.