Big BTWB fan here, with a suggestion related to the fitness score
I believe the fitness score is not quite as accurate as it could be. Let me spell out the issue and a suggested solution
However, when that score is used to determine your fitness level, it is taking into account other users who may not have entered their scores for other categories that feed into the fitness score.
The Fitness level is meant to reflect your level of fitness across all other modalities/categories.
Solution: The Fitness Level should only be calculated based on scores from other users who also have a fitness level, not every single user who has ever entered their score for the workouts.