Here is a writeup of the problem I believe your method has: https://www.lesswrong.com/posts/6EMdmeosYPdn74wuG/wireheading-as-potential-problem-with-the-new-impact-measure
Here is a writeup of the problem I believe your method has: https://www.lesswrong.com/posts/6EMdmeosYPdn74wuG/wireheading-as-potential-problem-with-the-new-impact-measure