I'm not really in a position to judge Demitriou but considering the growth of AFL and VFL in the past 5 years or so I'd say he's doing OK.
I'll agree with you that all the rule changes have been and do get annoying but have a look at the history of the game. In the beginning there were no rules therefore there has been continual modifications made to game since it's conception 150 years ago. And the game continues to evolve to this day.
North Melbourne has proven themselves strong enough to escape relocation for now, you should be proud of your club. Which I'm sure you are and with the resurgence of VFL and expansion of AFL in Australia it only seems right that all the states and Territories should be allowed to showcase an elite side to represent their respective state. I personally would love to see this happen especially for Tasmania unfortunately tho, West Sydney is on the cards before Tassie.