In situations like this, I try to focus on whether the other person understood what was being communicated rather than splitting hairs. In this case, I don't think anyone would be confused.
I'm glad that he is raising the flag after the devs failed to take it seriously. Evolution is going to have to do PR damage control soon and talk about how they're changing things to avoid this in the future.
Be careful with this. Each project has different practices which could lead to false positives and false negatives. You may also create the wrong incentives, depending on how you measure and report things.
I wonder if you could track the usage of features known to be used for fingerprinting and disable the functionality if enough are used. I assume that most sites using advanced fingerprinting like this are also the kind that would remove it quickly if it causes the site to break.
re: PanGui, it seems nice but the fact that they don't even have "accessibility" in their docs means it really shouldn't become widely used until they address that. It would be a big step backwards and one that is unacceptable in these modern times.
Unfortunately, the way they've designed it without accessibility in mind from the start means it's unlikely ever to be anything other than an after thought.
Definitely more accurate however it's UX is awful and doesn't do a good job of prioritizing issues. It sucks that you basically have to install a screen reader app to get the most accurate idea of how screen readers see your site.