Hey Dashcoiner.This FUD about PrivateSend has been discussed and clarified many times. We don't have money to waste on another study proving what we already know.
Can you provide some links to the other studies that you are talking about? In my opinion even if no transactions can't be de-anonymized it doesn't mean that PrivateSend is flawless and there is no room for improvements.
Have you seen any other analysis that can give you the most probable mixing sources even when a transaction can't be de-anonymized?
Did you check my analysis of the de-anonymization contest transaction?