But that's only a thing in the longer events, since one would generally go all-out in everything under 800 meters anyway.
For short/long hurdles, they should simply do the 100/110/400 meter hurdles twice, if they so badly want to have it as a double thing. Having all the hurdle specialists do flat races is fun for a bit, not gonna lie, but it makes the whole thing feel mostly like an exhibition event.
Besides, start this in a small stadium in the US instead of something big like this. Now it had the feel of a random training field somewhere in godknowswhere. Why does it need to be so massively American immediately, start a bit more...humble, and try and grow from there.