Remember all them aram accounts? Gave me an ARAM variant idea: Ranked Chosen pool aram
here's the idea, its aram, it's a ranked thing, you set up your pool of about 20-30 champions, the free rotation champs would not be a part of this.
then you queue up and can't reroll, but you can trade and otherwise have a better selection of champions: this would be an alternative to aram not a replacement, and would be more 'serious'