I couldn't help it, I just had to...
“There are three kinds of lies: lies, damned lies, and statistics."

I always enjoy your stats posts. It gives framework to discuss things a little more rationally.
My first reaction…
1. Hmmm. The plane:GV K:D seems too GV weighted. Aircraft should be the terror of GV without sufficient air cover to protect them.
2. This chart doesn’t appear to illustrate a big change with AHIII.
But, there might be more needed data along with this to draw a proper conclusion. This may not be enough to tell the whole story.
If you could product a companion chart that combines number of GV kills of planes PLUS number of plane kills of GV. That should be a rough estimate of the frequency of attempts of planes trying to kill GV regardless of outcome. Not perfect. It won’t count attacks that resulted in neither plane or GV death, but there is probably no way to measure that.
While the success ratio of plane attacks on GV might not have changed much, the volume of attempts of planes attacking GV may have changed. e.g. The K/D ratio may have remained steady ~0.85:1 for attacks attempted, but the number of attacks attempted might have dropped off precipitously after the tree-pocolypse.

Or maybe not. But you might need both metrics to draw a useful conclusion.
