Buff/Nerf/Rework list.
This is my personal opinion, you do not have to share it and you're more than welcome to disagree.
Rework:
(Minor for Liss)

Buff:

Nerf:
(Late game true damage)
(More defined weaker early game for champions who aren't strong during laning/early game) 
In my eyes, keeping in mind I am often incorrect, these are what I would look to see. This is the TL;DR, I'll explain why below.
Since he has god awful scaling and no HP shredding abilities, Pantheon is a champion who wins the early game and loses late, if they return to the lane with HP, you have lost it. He isn't consistent enough to be a viable pick unless you go by the name of Keegan.
Outdated kit.
I've seen a lot of Lissandra mains complain about how she's underpowered but it's not because of her stats it's because of her passive, give her a real one.
Outdated kit and graphics,
How many bugs again? But seriously, if someone on your team intentionally picks this champion, you will lose.
He's in a fine spot but he gets outshined by his competition.
Players should be rewarded for playing Aurelion, he can become extremely opressive if you go up against a great one and you'll complain how broken he is but his weaknesses are too clearly defined for too little pay off, unlike the competition, being Zoe who will one shot you from under her tower.
I think Braum is in a nice balanced place but again, getting outshined with what he has to compete with. If you've locked in Braum and then they pick Pyke you've already lost lane, I'd like to find the balance between support and midlaner again from Braum killing them all until they go back to their lane [sg-syndra]
She's a skill reliant champion with medium payoff but there's non-skill reliant champions with high pay offs, just some QOL.
No buff list is complete without Shen.
I'm pretty sure Sion doesn't have one good match up, CC is too predictable and he's got no damage in hit kit, or sustain. You have to be sadisitc to pick Sion right now.
Early game ghoul reliance isn't consistent, an early poker will invalidate him into oblivion, towers are made with paper and Yorick loves this however it's pretty difficult to get a split off now a days due to the increasing player skill average.
When's the last time you saw a Skarner in your game?
They "BUFFED" Sejuani with her adjust and left her in the garbage can.
Free summoner spells which are a critical point of the game. Free movement speed, one-shot combo and little to none counter play due to the absurd range, I would delete this champion if I had the abilityto.
Rewarded for drooling on himself. Win lane? He spams Q and he's back to 100%, then you're dead. Mundo does not require a playstyle, he requires "me hp low me stand back then me kill you lol"
Wukong abuses lethality too well and Quinn is able to move around the map with ease while top lane is seen as an irrelevant role, Quinn changes that, no other champion does.
One shot combo, clone, invisibility, absurd amount of mobility. Allow me to play the game, please?
Late game true damage reduced and make him slower, he shouldn't be able to walk up to a mobile ADC.
For a champion who's entire purpose is to be strong in the late game his early game is too strong. If you are unable to bully him early game which is entirely possible he will get out of control and shred towers worse than Yorick with his ultimate. You neeed to define his weaknesses for melee champions and non-lane bully champions, rather than give him additional buffs. He doesn't preform well around the boards but buffing him is a very bad idea.
Just fuck Taliyah lol
and do well, ill have to try his new kit seems good, also
now back to old rengar haha no more leap on Q ok thats fine...but seriously leave my