I mentioned this idea a long while ago but why not shrink the pci when it leaves the zone? I know they attempt to limit it based on the range of how far your pci can go outside the zone, but any diamond card usually has high enough vision/contact that their outer PCI still extends to unrealistic lengths.
For any part of the pci that’s outside the zone, have it shrink by 30-40% (whatever is fair) to reflect the fact that once you start leaving the zone, your chance of making contact decreases.