You pretty much hit the nail on the head. I was discussing this at the game last week with a woofer. Players take possession and also wait for the tackle and they just hold it in. This is then repeated over and over.
In the old days, especially on a muddy day, there would be 15 players on the ball. Umpires would pay a free to just break it up and keep the game flowing, now they are reluctant to pay a free.
Tell me, how can Freo only have 4 free kicks in three quarters of football.