This could be a good test for balancing the game/making the game more fun
To start, I'd like to say that I DO NOT think this should be a permanent change at all. For maybe a week, make 30 bans a thing. Every person gets 3 bans.
Then look at the ban data. It's clear that people ban champions consistently for only four reasons.
Reason 1 - champion is op and people don't want to play against them Reason 2 - champion is poorly designed and not fun to play against Reason 3 - champion is new and people don't want them on their team Reason 4 - it's the counter to their champion or team composition
Reasons 3 is more or less irrelevant now as people are familiar enough with zoe. Reason 4's contribution to the data is fairly random as it depends on the champion people play or their teams composition. Furthermore if one champion counters far too many that can be taken to be reason 1.
With this in mind I think it is safe to say that reasons 1 and 2 are the main reasons champions get consistently high banrates. BOTH of these reasons are reasons to balance these champions or rework them.
The downsides of this kind of experiment is people might try troll bans on purpose - ban all adc's - etc. But I think in ranked people would focus on more meaningful bans like yasuo and zoe because with all of the strong stuff being banned, any and all strong picks left unbanned could give one team a significant advantage.
The upside is that it will be clearly visible what is either broken balance-wise or design-wise and needs to be fixed.
Furthermore, this will encourage champions that are before unplayed to be more viable and fill roles that are empty due to the bans.
What do you guys think would be permabanned if this test was to take place?
Personally I don't think yasuo or zoe will be pickable in lower leagues - which brings me to my next point.
If some champions are so poorly designed or overpowered, why isn't an experiment like this, or even existing ban data used to balance them or fix their designs?
It seems to champions the majority of players do not want in their game should be changed until people only ban for strategy purposes. Am I wrong?