i think it would be great if you can quickly change what a pawn should promote to. For now, you can adjust it permantly for all games in the menu, or choose ingame, while your time is running.
I would suggest a little ingame menu, where you can set the piece the pawns should promote to, if they have the chance to do so. So you can set it, while the opponent is making his move.
The possibilities, as seen in the picture, would be:
There still could be in the menu the setting for that, and it would choose at the start of the game automatically the chosen piece, with the possibiliy of changing it on-the-fly. The menu should be optional, if people really need that space badly.