Well, you're slightly going beyond my expertise, so I'll just say that right at the outset.
I am a member of a U.S.-based organization called Heterodox Academy, which is really committed to universities as non-partisan, truth-seeking institutions. They've done a lot of research out of that institution that talks about the ineffectiveness of DEI, and a host of different kinds of DEI training, in actually reducing discrimination. There is some evidence, as I understand it, that some kinds of training can actually make things worse and can lead to worse climates. I won't pretend to be an expert on that, but I know of research on it.