This seems to be a trend for some time now.
Basically Riot thinks that underplayed champions are too strong, because they are underplayed.
You may think, "What the f-". Now, now. Let me explain.
The thing is some champions aren't liked by most people.
Why? There's a number of reasons. Two of them are the most prevalent.
- A champion itself is of lower quality. Think visuals, sounds, voice.
- A champion lacks something crucial in their kit and/or doesn't have a way to compensate that fact.
Now, here comes the fun. Notice nearly all popular champions until the preseason patch had one thing in common - Mobility.
I mean, look at the top 15 right now. There are 2-4 champions without on demand mobility and all of them are supposedly overpowered in a way to compensate.
Now, to the actual topic.
Thing is unpopular champions are generally immobile. Period. No flashy plays, no plays at all.
Despite that fact, they may be still strong(notice "not overpowered"), but an average Joe will glance over them and think, "Yeaaah, whateva, I'll play Yasuo."
But what happens when somebody finds out they actually like that immobile, underplayed champion?
They master said champion to be on par with even those 20% pickrate 55% winrate Top 10 champions in the game.
How come? Not only said champions have clear strengths and weaknesses, they also have the element of surprise.
When your average player ends up laning aganist, say, Galio or Zyra, they are like "What do I do?!" and lose.
But since that's an average Joe, they won't actually bother what to do, shrug it off and move on.
Hence why underplayed champions with microscopic playerbase usually have high winrates, and overally good statistics across the board.
So what happens?
They get nerfed, because a bunch of Plats and low-mid Diamonds can't adapt their playstyle with Zed.
Don't worry, I've been there once. When they nerfed Syndra of all champions. I was like, "Wut?". Then I read patch notes and what I saw: "This champion is a lane bully. We can't allow that champion to bully our flashy champions, so we gut her laning. Thankyouverymuch."
Short story: Welcome to the League of Legends where the Balance Team can't stand straight.