New game mode idea

I was thinking if you guys can make a gamemode with different classes and power ups, so there can be 5 classes assasin tank mage ranged and meele and what they will do is if you playing a guy like fizz and you go into the game mode you can make your class ranged or mage/tank and you can make fizz and tank or a ranged champ. Also i think you guys should add power ups like speed or double damage where you can find it on the floor and get the buff