I do believe that A-league final tickets should be more expensive than the regular season, but not double the amount ffs. Talk about cutting your nose off to spite your face. 

Premium pricing works for premium events.

People paid $500 - $1000 for Adele tickets.  They probably will only ever have the chance to attend that concert once in a lifetime.

This is the 4th time Victory and Roar will play this year.  It's a very interesting match.  It's not all that premium though. 
The pricing has been like this for years.  It's nothing new.  The willingness of people to spend their money elsewhere this year should be a huge warning.
That this story exists should be another.  People are choosing to stay away and are talking about it.

The GF will still sell out.  Always does.  Right?