Does FoCal actually allow you to set an adjustment outside of the -20/+20 range, or does it just report that a greater adjustment is needed? The latter would be simple extrapolation from the testing, whereas the former would seem to require modification of the firmware...
The larger adjustment range is a promised feature at some time in the future."And the following tests coming shortly after release:
Storage of test runs for comparison over time
Out of range testing - take the AF Micro adjustment value outside of the normal +/-20 range for problematic lenses.
Autofocus Performance Test
Autofocus Consistency Test
Lens profiling (sharpness at different apertures, field curvature and more)
As well as the above features, FoCal Pro will be the version that any new features are added to. So if you want to get the new features sooner, FoCal Pro is the way to go.
So, if its a successful product, we will likely see these features.
The product is not for everyone, you need to be really careful with your setup, and to understand that some lens / body combinations work poorly and testing will show this. Its nothing new, but we can now easily see it, and the new tools in the future will make even more info available. I can see sellers providing a copy of the test curve to show how good their lens actually is. The repeatability of a lens body combination is likely more important than the MA setting, unless its way off.