"X is fine, X doesn't need changes"
Listen up.
If a champion is nowhere to be seen, even when the Meta heavily favors that exact champion, it means said champion is not "fine".
Look at Trundle. Trundle is supposed to be the fucking Messiah that will bring an end to the tank Meta, yet he doesn't see play.
Why is that? Because, despite being "good", he is not "good" enough to compete with champions that shouldn't even be picked in the first place.
Trundle is not "fine", he is "weak", just face it.
That's why he is getting some buffs on the PBE, despite not being major changes, they might still push him into the Meta he should thrive on again.
Same with Koggers. Kog'maw is supposed to be at his strongest in this Meta, he can arguably carry harder than Vayne due to his extremely long range and having a utility tank team protecting him. The decline of the Assassins also helps.
However, Kog'maw doesn't need buffs, infact, any buffs to our cute little Koggy would probably break him in Competitive play, let alone in SoloQ.
So why does Jinx have both more Popularity and Win rate than Koggers, because Jinx is horribly overtuned.
She is infact so overtuned, she has sat on this 53-54% win rate forever, hell, she even peaked 55% win rate during the Assassin Meta, the Meta she is supposed to be at her weakest, considering she doesn't have an actual escape tool.
And no, her high Popularity doesn't come from her being "fun to play", despite that being a factor to be considered aswell.
And why is "Fun" such a Minor factor in Jinx case? Because of her Win rate.
There are many champions played because they are fun to play.
Lee Sin is very fun to play, but there are not that many people able to play him to his full potential.
That's why Lee Sin himself has High Popularity, yet Low Win Rate.
People keep picking him, not because they have a high chance of winning a game but because Lee Sin himself bring enjoyment to the player.
The same applies to Vayne.
Her Win rate is around 50% because the Meta is in her favor. She used to be around 44-47% before the Cinderhulk Changes.
But why is her Popularity so high? Because she is fun to play.
Power usually drifts into 4 different directions.
Low popularity and low win rate - Garbage champions, only a few can make them work due to the nature of their kit. Such as Elise.
Low popularity but high win rate - Good champions, people don't play them much due to them being hard or the Meta not benefiting them. Their win rate is high because only people who trully know how to abuse their power to full extent are playing them. Many of them are absolutely cancerous to deal with because of how little you can do against a well played Swain in early laning, since he has weaknesses but they are not so easily exploited as someone like, Garen.
High popularity and low win rate - Fun to play champions, people keep picking them because they are fun and not because they win games by themselves, Lee Sin is the prime example.
High popularity and high win rate - Most of them are either broken by default such as Jinx or favored by the Meta like Sejuani. The worst thing about these champions is that some of them are the very worst type of what one would call "overpowered", they are "fun".
What do you get when you have a FUN champion overpowered as all fucks?
An oversensitive playerbase who ignore the champions overwhelming strengths which largely overcomes any weakness they may find.
Oh, and many downvotes from those same people.
But that's fine.
This is the Gameplay & Balance Gold & Below board we are talking about
Here we just ask for Sona buffs and complain about Zed and shit.
TL;DR
Jinx is freelo