@Stashu - Thematic Changes for Cassiopeia
It took a chunk of a year after the initial rework (which no one wanted) to make Cassiopeia reach a point where she is viable in most team comps. Let's not beat it around the bush, before this patch almost no one would play her because her early game was non-existent and her full passive was nearly unobtainable. She was a detriment to any team composition.
As she stands now she still has that annoying passive that frustrates many of us to no end, but at least it's manageable and she doesn't automatically get hyper shrekt early game. Her theme and gameplay can no longer be as a poison mage but the majority of old Cass players did build her as "Rambo" Cass with maxing E first and using that as the main damage source. The big difference is that we had the option of maxing Q first situationally as we needed, we've lost flexibility and those who only liked maxing Q first got boned.
Now the group who want her to be more of a poison mage are stating their opinion and you're on board for changes (which I totally understand the point of view of, and I don't disagree with the reasoning), but this is going to piss a LOT of us off if you don't let us have the options or path we have now when you rework her again. I've waited months to play this champion again, and I don't want to wait months again while you experiment and try to appease those who want a different theme.
My suggestion has probably been made before: Rework her in a way that lets the player choose which style Cass can use, including the current "everything in E" style. Figure it out, make it an evolution system, make it a weird passive, do whatever you need to do to preserve Cass as she is now while giving options for those who want a different style. I mean stat for stat down to the point of mana, if the option to have this current end-game Cassiopeia is erased in order to appease a different group then you've improved nothing. You would be appeasing one group while letting down another. Let us all have what we want, allow flexibility without deleting the current Cass.