I was one of the downvotes. Clusivity, as described in your article does not apply to y'all. It's You All...it will never include the speaker.

It'd have to be something like w'all to apply.

We’re very inclusive in Australia also.

‘G’day you bunch of cunts’ means hello to everyone male, female, known and unknown.

We’re very polite over here.

Getting pressed enough about a single downvote to make an edit is cringe.

Yeah. We mostly think of grammatical number as a simple choice of singular vs plural but that's not what we do in real life.

We generally have multiple labels that describe the concept of progressively expanding circles of what's included when we think of ourselves.

There's the very narrow sense of I/me/myself. We have various expansions around us/all'y'all. Jamaicans have the phrase "I and I" which focuses on the individual but explicitly calls out the connection with others.