AR Summoners Rift

Why isn't this a thing yet? I mean, I know you can make a custom game that's AR but who wants to go through all that hassle. They really should just make it an easy find queue mode like blind pick, team builder and all the others. It seems like such an obvious mode that I'm kind of annoyed/surprised that it hasn't been implemented yet. And ARAM isn't the same. You can make the argument that it would be kind of crippled by the fact that people have larger and smaller pools to get a "random" hero from based on how many champions they have bought but I think it is still viable when you take into account the FTP champs.