Awesome! Yeah, I'd love to discuss this more when we'll start implementing this feature (later this year).
Another way to handle it is by having people vote on how big / important the edit was relative to the page's content. Let's say people decide the new edit added 10% value to the page. That means for the next likes, the editor should get 10% of that like and all previous editors should split the other 90% (recursively).