I agree that would work and would make for a much higher cut line.
But.....and this has been discussed ad nausem in the past - the amount of money (in balls used) that WGT will earn on unlimited Open qualifier rounds will be enormous. So....the format will more than likely remain the same, no matter how many times people complain and post on the forum.....
So - just play the Qualifier if you want to - play it as many times as you want to, in short work within the framework that has been provided, or vote with your mouse and decline to participate.