Anyone else think this?

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I mean think about it, Yasuo and Lee Sin were for legit reasons and Riot clearly doesn't care to deal with this, now ZAC is practically perma banned cause Riot won't swallow their pride and admit they fucked up

I'm not sure they did. Their prime design philosophies seem to be "stir the pot" and "don't go back". They want champions to have their moment in the sun. Ya know, be OP flavor of the month for a while. It adds revenue from people buying skins on new champs. If nothing else.