Draft Team-builder
I have seen threads about Ranked Team-builder systems, the pros and cons. Honestly, I could care less for ranked, it's just a whole new level of drama to me.
I would really like to see a Draft Team-builder. It's not ranked, it's something new. It would also provide the options for changing runes/masters to better suit your needs for you to lane your opponent. It would prevent mirror lanes and possibly allow you to prepare yourself for an OP champ that might counter you hard.
It wouldn't hurt to test it out.