This idea is present in many projects. But so far, I have never seen anyone realize it. I think that if IEX succeeds, it will be a tremendous success!
At least project IEX has every chance to succeed. In addition, do not forget that the project offers the possibility of using exchanges without any verification of KYC, which should also be interesting for many traders and investors.
Although verification is also a good idea, but I agree that many people do not like this process, I think this is due to mistrust in people and simply selling their documents in the future