You're not listening
The Grand Final is NOT on 7mate - it has to be on the main channel by law. In Perth - it is on 7 - so not in HD
In Perth = 7mate = HD (70)
Not all games are on 7mate. This week 2 games are on 7mate, 2 games are on 7. So only 2 games are in HD. Ironically the 2 games not in HD will be the Eagles and Freo games.
I'm not sure why you arent understanding this ?
Edit: I'm over arguing this. What I'm stating is fact, and your quotes even back it up.
It is FACT under the current arrangement WA do NOT get all games in HD - including the Grand Final - as they are not all shown on 7mate (which is the nominated HD channel for WA, QLD and NSW)
That MAY change - but has not been mentioned anywhere. I'll leave it at that.
The Grand Final was in HD on 7Mate last year anyway http://www.afl.com.au/news/2015-09-26/fans-rejoice-with-grand-final-to-be-broadcast-in-hd