Basically sums the title up. Riot has made a bubble where they will only give attention to 20-30 champions, be it if they're already busted. And whenever a champion enters that bubble through item changes (Kalista, etc) they kick them right out.
This is the exact same for any game with 100+ champions/playable characters. There's only so much you can do with a passive and 4 abilities before you get cliche or force extremes or gimmicks. There's this 20:80 principle, 20-30 is approximately 20% of 135 champions who will get 80% of the attention, whereas the rest 80% or so of champions will only get 20% of attention.
If there are enough 'things', this principle will often show up.
But it's not new, not new at all.
Kalista got changed because she was 100% pick/ban in every region in pro play. Isn't changing her numbers around giving her attention? Riot can't balance 140 champions at once, they have to go through the highest priority ones first, then work their way down, that's the way limited resources(the balance team in this case) work. Riot isn't sitting in a back room chuckling to themselves while they change lux around to make her e easier to avoid in lane and giving her late game scaling on it(scaling cooldown). They're not chuckling to themselves while they lower skarner's stun duration after overbuffing him to 100% pick/ban in pro play.
They've always done this
<--- Riot games: NOPE NERF
<-- Riot: NOPE NERF
Oh hey gu- <--- Riot: OH HELL NO Lowered ap ratio for galio
... Gee thanks
It cant be another way really. Unless you give all champions the same abilities, people WILL find the most optimal champions/builds to win more often. The same way mmorpgs have the number crunchers figure out the strongest dps classes etc. The same way pro sports coaches figure out what types of players they need to get that championship squad. Welcome to life, glad you could join us.
Long time everyone told Riot to fix its stuff; the game is still in an awful state and getting worse, and the consequences are finally coming.
No really? it's impossible to balance 140 champs perfectly? yikes who woulda thought.
Given most champs get seen in competitive, i doubt its that bad.
the more champs they add, the harder it is to balance the game
the crazy kits of champs like camille or irelia only add to that difficulty
there's a point where new champs make the game worse
I'd rather have a balanced game than 10 more new champs
I think part of the issue with this is that it is difficult for League to laser-focus its balance on specific champions. The moment an item or rune gets changed, dozens of champions end up having their own balance thrown off, because they either use that effect or are especially affected by it. Because items and runes have always received frequent changes, it's difficult to really fine-tune vast amounts of champions every two weeks, or even every four weeks, in response. In a stable game, whichever champions don't receive immediate attention should not necessarily have to be in need of attention, but as it stands League isn't really there, as it does feel like most champions are receiving either far too much or far too little attention at any given time.
I also feel a recurring issue has been that Riot still has difficulty finding their footing in League's balancing environment. Changes that are intended to be either power-neutral, or only slight pushes in one direction or the other, end up throwing the balance of the target champion completely out of whack, and even new designs sometimes generate critical failures in gameplay, forcing them to inevitably be overnerfed in view of an eventual rework. Part of this problem may simply be that League's balance environment is too complex to fully grasp at any given time, what with its layers upon layers of different interconnected systems, but I think part of the problem may also be that the environment itself, and its underlying ruleset, changes radically over very short time intervals.
Whereas MOBAs like Smite, Dota 2, HotS, etc. only rarely add new items or implement other systemic changes, League adds, removes and reworks items with much greater frequency, all while implementing similarly large changes to runes, Summoner's Rift, and sometimes summoner spells too. This, in turn, creates a different meta in which different mechanics are stronger or weaker than before, thereby changing the way one would have to gauge their power. It's this constant instability that I think is at least partially responsible for so little of League's roster being considered good at any given time, and while I appreciate that Riot has tried to shake things up, the long-term result is that a ton of resources have been wasted on whack-a-mole-balancing, when they could have gone into much more durable improvements, and stabler champion adjustments.
But only 
he will be nerfed cause of pro play and not his function in solo q or viability.
People complain about champs not being high pick rate/win rate, people then complain about power creep and things being too op. Honestly people just like to complain.
This is why they should've stopped makin them a long time ago. They're not even tryin to be reserved about it there's like a new champion every month now lmao. There's gonna be like 1000 champions by the next couple years and they still won't fix the core design problems, or bother tryin to make even a third of their fat-ass roster actually playable lmao
Seriously they don't even give you enough time to get used to the last new champion they introduced before another teaser for ANOTHER champion is out
