I would like to build new thresholds, based on the feedback from scripts. This would require parsing the results from the scripts, comparing with standard texts, and picking out numbers that thresholds can be set for.

I think this would allow much more customization, especially for Macs and Linux devices that don't have as much standard functionality.

My current use case is this:
We have mostly Macs, and we require everybody to encrypt their disks. We can check each device by running a script (The "FileVault active check" from your standard library). If the disk is encrypted, it always returns the same standard text. We would like to set up a threshold that gives us a critical warning if this text is not returned from a device, so we do not have to run the script manually.