Both of those statements convince me even more that this is a bad idea. While the author's past experience is important, it has little bearing on the current PR. Same for similar code change. In code review, the skill/history of the developer is only really relevant when writing comments. You should look for the same potential mistakes and logic errors in a Senior or Junior developers PR. Adding the developers experience as an input could easily lead to the model deferring to experience. In my mind, that makes the signal this is providing potentially harmful, not helpful.