It would be great if GameOn could also receive real-time game stats from Beat Saber, such as average accuracy and be displayed instead of win rate.

Additionally, it would be nice to see on the "Stress over time" chart a highlight when a song was played (maybe even just a truncated song name).

A further minor detail is that "Match Ready" could be renamed to "Challenge Ready" to know when to tackle a more difficult song.

There's already multiple mods which read out data, see BeatSaviourData and Bsaber for inspiration.

I believe that a VR overlay can be omitted as you can easily view game statistics by viewing the desktop screen in VR with a simple button press after each song.