Around 130 champs and still only 6 bans total.
For the ever expanding champion pool, still limiting the bans to 6 champions a game seems like a lesser impact on game play especially whenever a champion is released / updated / reworked / Nerfed / buffed / or becomes synergistic with an item. When a group of fisherman go out, they are limited by the size of the boat. If they are in a small pond, a tiny row boat works just fine, but when they venture out into bigger waters, "Were gonna need a bigger boat" - Roy Snider, Jaws. (fish are champs and the boat is the ban limit).