Reminds me of the Judges Guild "Universal System" where they had a lot of weird stats in their books, often with some made-up rules, just to avoid any issues with D&D at the time (late 70s/early 80s, I think).
Event went so far as to have three-digit stats, stating that the first two are the regular ones (to correspond on the D&D 3-18 range) and the last is "how often you can use it without having to roll for a stress test".
If you're going that unusable, you might as well write for your own or a non-litigious system and let the people convert it themselves. It's a lot of homework anyways…