Cass is not in a good spot design wise
Her passive is still a ridiculous ball of stats locked behind an arbitrary and painful stacking mechanic. It doesn't even make sense, how does poisoning someone make you stronger? It should make them weaker, hint hint.
Her E is basically her entire kit. Her others skills are simply tools to set up the E spam while barely tickling the opponent.
Her poisons are still ineffectual unless you land the E, let those skills stand on their own. Used to be, you could choose if you want single target shredding ability or aoe poison power, now all her power is shoehorned into the E.
This rework was rushed for a lore event of all things, well you guys have all the time in the world now to fix the mess you made for it. Don't just travel down the same path you rushed for to push it out for the shurisimsismsiams event. Think of a new passive, there's some good ideas on these boards (like ya know, making a poison mage debilitate her opponents with a temporary stacking debuff rather than make herself more powerful somehow???), balance her kit so it isn't just Twin Fang and the rest of the shit that makes Twin Fang work.
I do not care that "she is in a good place" because win rates or whatever, she's not in a good place design wise, and it should be so painfully obvious what to do to fix this. And if it's not, there's lots of posts out there that will hit you over the head with the solution.
EDIT: I didn't know I had to tell you guys what to comment on. It's a Cass thread, you know the drill by now. Do you think I'm a big ole hating meanie butt for thinking that riot is anything other than infallible? Do you wish you could turn back the hands of time to change the course of events leading up to Cass' rework? Did the paltry 4.22 buffs make everyone give up? Who's still out there? Where my dogs at?