Don't know if it's been said, but I feel the GD kills a match dead. I feel there are more races being thrown as teams try to stay less than nine in front. Then when you do fall nine in arrears the fightback depends on what riders you have programmed before you use the GD. The old 6 points in arrears was best as a side could use more of its resources in an attempt to pull back. To me, the GD has tarnished speedway's image even further, plus it's crap.
If the rule was brought in to save money, why bother with the heat 15 nominated race. We already see the same riders in heat 13. In fact, to save cash, go back to 13 heats. But that's another grumble.