Broken vs Strong Champions

We can all get mad at the fact that their are some very strong champs in the game but the truth of it is that they make this game fun for us casual gamers and spice the competative game up. But how can a champ be "Broken"? In my opinion a champ with minimal counter play and will always have the potential to assassinate you no matter what is "Broken". Some champs like Lucian and Yasuo are what are called strong picks. The difference between broken and strong is that strong champions still have counter play and do require some sort of effort and skill before becoming a fed monster. Broken champs like Yoric and Volibear have minimal to no counter play and are strong no matter what happens in lane. Riot as a company should definitively look at the difference whenever they decide to nerf or buff a champ. That will make this game much more enjoyable.