Best Idea for a new gamemode!

So, I've been thinking about how some of the gamemodes get boring with long games as the same champion for 30-50 minutes. As one of the seasonal game modes, maybe we could change that. Imagine getting frustrated as you get killed as a super squishy champ, then respawn as a tank champ. Every time you die, you respawn as someone else, randomly. I just think it would be cool to get to do that.