Good "thoughts" Poita.
GWS prepared for this well. They picked their two toughest players to wear Daisy and O'Dea like a glove for much of the game, (though if Paxman hadn't gone down they probably wouldn't have been able to cover the three of them), so our two best ball users were under the pump most of the time; when they did get clear, they were really damaging. GWS defended in numbers and stopped us spreading from stoppages pretty well; they tried to score on fast breaks, and did move the ball well at times.
As others have said, defensive skills are easier to teach to "average" players than attacking skills - the tackling, for example, has gone up a notch from last year, as has teams playing a defensive strategy. It will take some time for the attacking skills to catch up. And there are a number of players from other sports who have definite athletic ability but are still learning the skills.
The problem about expansion is that now everybody else wants a piece of the pie, including the clubs that were indifferent at the beginning, though other clubs might feel justified in believing they were gazumped at the original allocation. The AFL will probably engineer it so that the big Melbourne clubs, Sydney and Brisbane (GCS) will be at the head of the queue.