There is a simple solution. Hormone therapy needs to be complete before competing for the other gender. Then test T:E ratios. How hard is this to understand?
Well wait, is it really that simple? You can’t change how the hips are built and women have vastly different hips. This would affect gait and speed.
It would be be interesting to study the Q angle of collegiate or professional sprinters and distance runners and see how they are different compared to a normal population. My guess would be the Q angles are closer to that of men than a normal population of women. I could be wrong.
Alan