I think the pause menu should have a settings button so you can change your game settings (well some changes need beatmap/game restarts). Sometimes, I need to change the skin of my game or check out the keybindings while playing, but since there is no settings button in the pause menu, I need to go back to the main menu to change the settings which seems to be a long way. But, if there is a settings button in the pause menu, players can have fast access to the settings when the game is paused without leaving the beatmap (but for some changes, you need to go back and play the beatmap again)