Reworked Admissions Framework, thoughts??

What are your thoughts on a round based admissions cycle for universities?

In the 1st round, universities release decisions, if 70% students who were offered admissions commit, and 30% decline, the 30% seats can be applied for again in the next cycle. This can go on and on until all the seats are filled.

This can prevent students hogging multiple acceptances or students not withdrawing their apps after getting acceptances ED.