Automation would not be anywhere near the quality it is without KillRob and the other testers hard work.
With regards to "cheating" by hacking the engine files. That can be easily fixed by putting in some various load checks. But even so, you should still get the various time/cost penalties with such large quality values. I don't want to close the file format, as it allows others to write little lua programs to pull the data out if they wish.