Global bans
What if every day 1 or 2 champions were banned from all games in ranked based on their ban rate on the previous day? Or maybe introduce an in-client vote for a global ban for the next day? Like a strawpoll. Would it be a good thing? Also as an option make it possible that if no champion goes past a certain value (like 50% or something) a global ban isn't activated. This solves a permaban-broken champions problem if they are overbuffed after a particular patch and allows to focus on strategic bans instead.
would never see the sunlight again.
players would be gone.