This is a very ambitious plan but it will definitely add more fun to the game.
Any part of the changes would improve the game. In addition, I suggest focus is given to how to increase player interaction or interdependency through these mechanics. The beauty of the game is in interaction. For example, the line setting is kind of player interaction, which requires players to discuss and communicate those settings, which adds fun. The added features should avoid becoming just simple button clicking, but should focus on these functions or settings' interdependency. After all, this is best part of this social game.
