Stashu, Be Reasonable
And come back to the conversation. You have to realize at this point that every day of silence is another day that you offend and disenfranchise the Casiopeia playerbase. I'm not even a Cass main, and I can see how incredibly messed up this rework has been. From the time of incubation to the time of iteration on PBE to the rushed release and the silence since.
I get it, the threads are scary and they are hostile. But you have created this environment with how you handled the situation. Scruffy had a similar issue he had to deal with, but he handled the criticism superbly and communicated and interacted with the concerned playerbase. There is no reason you shouldn't be able to do this as well.
It's been weeks. Weeks of no changes and no real conversation in sight, simply you assuring the Cass mains that "You're on the case." and honestly, that isn't sufficient. It especially isn't sufficient after admitting to having rushed the rework. Cass fans are entitled to the same sort of careful treatment that Skarner fans were after his rework. Honestly, the best thing you can do is just dive back into the conversation. Don't drag your feet, and bring a buddy. Grab one of the senior designers, or grab somebody who helped you iterate on the kit, and dive back into the threads.
You're going to need the help, but don't shirk the responsibility.