I think you are talking about several things at once.
first of all. What I was talking about with repertoir was that the numbers of bans doesnt change ranked for the better or not--that it wasnt because of the 5-6 new champs this year that its been called out to be done. You came i nthe conversation and added something saying that its all about the OP champs. So its not like im being irrelevant to the subject and OP. Even with 0 toxic champions, you need bans. Period. Helping or not helping that fact doesnt matter. When new items, nerfs to champs happens, new toxic patterns are born.
Now if you mean that toxic design needs to be removed, then no one will argue with you. But its only a fragment of bans. Sated devourer for instance brought an enourmous amount of BS in the game. But thats not the champions who used them per se that are the problems)
second of all: your Vi argument is a personal subjective one. I dont want to get into a Vi discussion with you. But ive heard people say that about every champ in the game and saying shes broken OP based on ban rate is a straw man. Besides: her ban rate is 1.3% which is 20X less than you say it was. Ban rate and perceived power doesnt equal broken.
Also, you need to understand something about comps. There is niche, there is broad purposes and roles.
Vi fitting in mostcomp is ok. Shes is ganker and a team fighter. J4 could fit in any comps just as much as her. Teams will always need these sort of champions.
Then there is niche: Kassadin, veigar, urgot and trundle are niche. They fill specific roles as a solution to specific problems in the enemy composition while broad picks are to fit your own. Besides: i dont see vi going into a poke comp, life would be very lonely for her. But she would be great to fight into a poke comp/mage comp.
thirdly: Top dogs was an illustration. I meant that no matter what happens in the game, there always will be stronger champs than others in specific categories : the broad purpose i was talking about. There always will be a better top laner, a better mid laner etc... thats just how the game is. its role-centric and doesnt fill a particular role other than being the stronger option.
Also, my stance is the same as Riot when it comes to counterplay. Counterplay is one aspect of balance. Its not all there is to it.
There is tradeoffs, champion eco-balance, weaknesses (which isnt necesserly a counterplay) and gameplay patterns.
I would think you were talking about toxic designs, which everyone agrees with. But thats nto connected to bans anyway since you always will need those. but its part of the solution indeed. To eventually get access to strategic options.