Like anyone ever does that many custom games, let alone customs on a random setting with 10 human players.
Clearly you didn't read my first comment entirely. Nor did you really answer my question as I was expecting you to.
It's innovative in the sense that in what world would you see an unlikely composition on SR and not call it trolling? That's the point. You're now playing the game with what you get in the roll. Not just one lane with a bunch of teamfighting and not molding yourself to a meta where there has to always be that dignified marksman, dignified jungle champion with a smite, etc etc.
Random forced items is a thing called "Ultimate Bravery;" look it up. Random skills takes more complication than the original Doombots of Doom. One already exists and the other is not as appetizing as it seems.