Seems to me that Arche is over rated, people saying he's the greatest Australian coach of all time, sure he has his ideas and at Brisbane he was given a blank canvas to recruit so that his vision would come to life, but surely a great manager sets up a game plan around the players that he has. Given a couple of years and a blank checkbook he might get Victory playing nice football and challenging for the top, but this year I don't think his players are up to it, he should play a much more direct game and plan to play from the back next year.
Inflexible + team that can't execute your game plan = not in the finals.