You said you'd keep working on Cass until she was as good as she could be.
Stashu has quite a good track record on continuing engagement with a rework post-launch. I don't think anyone at Riot has done it better, in fact.
Now you've got Rioters coming on the boards and saying they don't see the point in changing her because she's strong, and pre-rework Cass players are facing our worst fear. We were so scared that as soon as she became strong, Riot would say "B-b-b-but her win rate is good! So clearly you all love her! My work here is done!"
Cassiopeia can still use some tweaking, but that's what it's going to be. Riot isn't going to move away from the E-centric kit they've chosen. Expect tweaks to how the passive scales, maybe some power smoothing (less late, more mid?), but don't expect Riot to change their mind about nerfing Cass poison damage.
I think they are probably pretty content with the results here. That doesn't mean you will be, unfortunately.
Lo and behold, Stashu lied to Cass players again. Who would have friggin' thought.
Dude, devs are people. If you want people to help you, you can't be a well of negativity like this. You haven't even given him the space to fail to live up to your expectations, and you're already trashing the guy.