Similarly to my previous recommendation to allow different zoom levels in game modes independently (decentralized), I also think it would be great to have the ability to set the volume for different game options independently, rather than having a unified setting across all game modes.
In different game modes, the music and sound volumes from different sources are not at the same decibel levels throughout each game mode; Return of Rome, for example, seems to have a lower volume compared to AoE2DE and Chronicles, so this suggestion doesn’t seem far-fetched.