Would we be able to avoid "Pay to Win" bonuses creeping into future events?

I was under the impression store purchases were only cosmetic and never meant to influence gameplay. Then why does the Golden Spatula Club include a non-cosmetic feature that increases win % rates? An additional reroll in a game mode called "All Random" isn't random, especially when you can stack this bonus in premades to trade an additional 5 champions. This is a game mode that can be won or lost depending on team comps out of your control and you're giving players the option to manipulate those odds with $.
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