Would technique training turn your best athletes into individual world championship athletes?
If not, what needs to be done to get there?
First, it's nature, then it's all in the muscle.
Why does Allyson need a world class coach if no sprint technical development is necessary?
Kinda begs the question doesn't it? It would be naive to ignore the politics of professional sport, which I'm very familiar with having negotiated several pro contracts.
What does she need to do to run 10. and 21. / What does Elizabeth need to do to run low 11 or 22. ?
Get as strong as possible to maximise ground support force, run short at a true 95-100% of max speed to maximise the plyometric effect of fast running, don't rely on images, have a hugely competitive spirit.