Few issues;
1. Constant rule changes
2. Maybe a breakdown in communication between AFL and umpire department
3. No full time umpires
4. Rules being designed to stop players getting hurt as opposed to winning the ball, I.e sliding rule.
The above is a relevant but theres definantly been a directive from the umpiring department and in turn the AFL to keep the frees to a minimun to keep the games flowing this year. Last year the teams on average recieved 20.5 fpg this year its 18.6 fpg.
Personally i think its had a negative affect on the game by minimising scoring oppurtunities in the F50 so essentially the 6/6/6 rule doesnt come into play and the teams just flood more. I think its just a matter of time before the decision is reversed.
I agree the umpiring's been particularly bad this year buts its more about the non-calls than the frees paid so the word has definantley come down from above to put the whistle away.
Ps: The 50's paid this year have been diabolical.