I've on and off mained Cassiopeia for about 3 years. This rework build is honestly fantastic to play. The removal of the reliance on the poison->E mechanic is a welcome treat. As well, trading her unnatural power curve through her passive for simply having a sixth item is lovely. It's like the Cassiopeia I love, without nearly as much focus on poisoning into machine gunning a target down. She plays much better and even with the bugged E cooldown and lack of info, this is a massive improvement. You're going in the right direction.