There is so much wrong with this season already. [[Cassi, Morde, Liss, Adc's broken items + more]]
I just want to start by saying that I'm not trying to rant, but I have never seen such disrespect for a player base than what Riot does to its players.
Lets get started;
Champions:
Those who you left to die:
Is still being left to rot in a dumpster, with absolutely no compensation buffs mana wise. I don't play much cassi anymore, but when I did i enjoyed her, a lot. Now you've subjected your poor cassi mains to play a 45 minute minigame against themselves before they can even become viable in the game. I really really feel sorry for the faithful player base that has to put up with this utter garbage you call a rework.
There are plenty of threads on this already, but you turned a decent champ into something permabanned, and so unliked by the entire community that this poor guy is no longer considered to be himself just a hunk of metal. Which just to salt in the wound a little, you tried to take that away from him as well.
I love lissandra, but you killed her. She's punished so hard for having that passive its unbelievable. She gets one free spell every 18 seconds. 18 seconds. Most team fights you cant even get off two spell rotations because of her ludicrous cooldowns, let along it takes 85 mana AT ALL RANKS to cast her Q. She also saw no compensation buffs mana wise.
Probably the most mana hungry champion in the game. Zero compensation for taking away her potions.
In desperate need of a QOL upgrade, her E is an absolute joke, next to no scaling on anything, a stupid mana cost for a tiny heal, zero cc aside from her ult, unless you mana to proc a passive + E which is rare. One of/ if not the only champions that relies entirely on actives from her items to do shit.
The champions that make you want to AFK. These guys will never see nerfs because of LC$ BIG PLAY$
This incredible piece of garbage actually managed to make it out of the design room. Wonder why champions keep getting more and more ridiculous <-- this asshole is to blame. A medicore use of a windwall entirely negates a large champion selection, these new masteries are broken as fuck and should have never been pushed to live. Enjoy your freelo if you like to roll your face on the keyboard. Please stop saying 'Yasuoo takes skill' because he doesn't. Im sorry, he just doesnt. You can proc your ult on just about every ability now, including really dumb ones, like thresh's flay, or a vi q.
I have never ever, ever had a fun game playing against this asshole.
- 350 base movement speed (you cant even get this with triple movespeed quints on some champions)
- can q across your screen, a huge time in which the debuff stays on your champion
- can jump to allies, to minions, to wards, to enemies
- have to screw up SEVERAL times in order to die, some champions you miss a single ability -> dead.
- HIS ULT STUNS.
- % executes on a few abilities
- even more buffs with jungle changes and a sight ward being built into jungler items.
- incredible scaling.
In dire need of some changes. I really dont have a huge problem with this aside from - his hook has a really LARGE hitbox, sometimes even completely missing hooks you.
- lantern is the most frustrating ability in the game. as he can save champions from like 1500+ range.
What have you done to mages? Just starting this section by saying; I cannot find a mastery build that works decently on AP mages that works as effectively as that abomination you call warlords bloodlust.
- needless cost increases on a lot of items
- gold efficiency is down
- decreased damage on items
- increased MR on a lot of tanky items
- decreased damage to squishies because of phantom dancer. -> the whole point is to kill them quickly, you're a god damn burst assassin. If they're out of place, punish them in 1 go. Heaven forbid they cant do 1k+ with a single auto attack.
New ADC reworks; a quick breakdown
utterly broken, an adc that can jungle quicker than those who were built to.
shitty early game, dont bother fighting late game.
easier to land rumble ult
a roaming disaster
enjoy being headshot + crit at 1450 range.
broken at all stages of the game.
Other champions that work insanely well with the new Item fuck ups:

Oh, everything has crit. Good luck with your AP champions trying to heal with you have Wounds constantly applied, they're healing for 15% every 2 seconds because of the warlords bloodlust.
I have no had a single game where: Graves hasnt been in the game Yasuo hasnt stomped mid lane 3+ adcs per team
than actually helpful contribution. Sorry to say your disclaimer does no justification.
(and many more) ults stun with significantly less mercy.