Different game modes

I don't really know if this has been asked before or is it planned already, but new game modes would be nice. For example, there should be like a Sandbox type mode where you can do whatever you want on whatever map you want and also if you die, you could respawn. There should be like a Stealthy Free for All mode, and like TDM mode where only way to win is by killing as much of the enemy team as possible, people respawn and team gets points by getting kills :) Those are some game mode ideas but there might be more ideas coming.