The idea that someone can go to a major International meet and wrestle one match and be done is asinine.
Seed at least the top 8 wrestlers. This will help in distributing the talent and, with a bit of luck, pushing for to top two guys or whoever beats them to face off in the finals. It will end the weak pool baloney where you have a bunch of talented wrestlers who have never won internationally in one pool and four world champs killing each other in the next one.
You seed the top 8 and draw the others out of a hat or something to fill the brackets.
Then, double elimination so everyone gets a chance to advance on their own without relying on someone else to win to pull them through. While you are at it, a true third and fourth place instead of the little league 'everyone goes home with a trophy' bronze farce.