We've already established that General Freedom is OP, for one.

Two, there's a give and take that you have to have. So no character is unbalanced. If you have max strength, you can come nowhere close to max speed. And vice versa.

And third, Maxwell and Kanitah would be perfect benchmarks for purely physical characters in strength and speed respectively. Try and put it somewhere between them.

Finally, a bit of a physics note: Once you reach a certain speed, which you're well in excess of, you're no longer running. You are flying. And if you have no way of maintaining lift and speed, you're going to faceplant at mach 4.6