For the slider Gain setting, I was asking about a numerical value because if I were to remove a song from a the play list and add it back, I can note what the Gain setting was previously so when I add it back I don't have to play around and figure it out again. Also, say I am importing something like Volbeat, who records at a high level, I know that all of those songs should be a -10 and say the Ramones, which is at a low level, I can quickly enter those in at a +20 across the board.
As for the time break. It looked like the fade function was across the board not a separate setting for WalkUp and PreGame. I have just been playing with the app but I have only played a complete list of songs.