The terminal opened in November 2015 - almost 10 years ago. I feel like if the fast track lane was ever going to open, it would have by now. Perth is certainly somewhere that would benefit from it, although with the Sydney and Brisbane "Premium Entry" only open a few hours a day, it seems (at least from their actions) that VA are moving away from this.
Great to see so many people using the Perth terminal but alas, it is getting as bad as Melbourne T4
Now that is somewhere that would benefit from a priority lane (or if there is one, some signage to make it a lot more obvious as to where it is)!
When I was there a couple of weeks ago, the pancake machine was broken and there seemed to be little desire to fix it (was loaded with 'mix' but produced coin sized pancakes). Hopefully it was fixed and you at least got some pancakes too...
Nice view out of the window at least!