User blog comment:Deshiba/Ban champion X!/@comment-5001455-20130812221354/@comment-4022742-20130815103116

There might be some champions that are out of favor at the moment, but only a few are due to their kit, and these champions have been recognized by RIOT and added to the Rework Queue.

But what makes these other champions not get picked up? Are, and  really not worthy of playing? Or is it just that they are situation specific?

Sometimes even Items can balance out a champion. Take the new for instance, it is specifically good against poke and DoT based champions. So good even that or  are not that effective anymore.

Some champions even don't get picked because RIOT made some champions too strong. And this is where the increased bans come in. It's not that older champions are weak or not viable, it's just that there are stronger alternatives that do about the same thing.

Increasing the bans, will increase the variety of champion picks, in theory.