I wouldn’t say 76 is a mediocre score. Just looking at Opencritic of this year, the median score on PS5 is 73, so AC Mirage is at least better than the median. Now, I know game scores are skewed horrendously and barely any outlet uses full scale (more like half of it at most), but still 70 is probably closer to an idea of mediocre. It’s all subjective though, but it is fun to try and make sense of it all