Champion roster changes.
I think its pretty clear at this point that Riot only wants certain champs played in ranked games. Lets be honest here, viegar, cass, poppy, zilean, heimer, urgot, ect... they'll never be 'up to par' and if they ever were riot would nerf them until they aren't. And lee, zed, ect... will always be more powerful. Why not just remove the 'unwanted' champs from the ranked roster. That way there is none of this 'miscommunication'. You can leave them in for normals or other game modes, it doesn't matter if you balance them properly or not (because clearly you have riot has no intention of ever balancing them). It'd be simple, they could pick their favorite 30 or so champs for ranked, and the rest are just 'fun' champs.