Acheron E2 really should be changed it feels like such a massive rugpull.
Even at E2 you still want to run 2 Nihilities simply because if you don't, you make stacks too slow and Acheron's downtime becomes a fucking abyss, being extra sad when you compare to Castorice's for example who can bring her dragon to vomit again almost instantly.
Not sure how they could change it tho.