How to make releasing new/reworked champions less toxic

Put a 2 day ranked ban on new/reworked champions after they get released. It's kind of toxic having to waste a ban on it because you don't want a teammate first timing something they've never played for fun, and you don't want to risk playing against something that is broken beyond belief. It's not hard to implement. Just make it so that for 2 days after release, a new/reworked champion can't be played in ranked solo/duo queue.