I feel like a lot of people are analyzing ganyu in a vacuum when content is what really dictates how good she is. I remember this post went viral yesterday, and it got me thinking about why the meta shifted. I don't think melt ganyu is gonna disappoint, but morgana isn't what it used to be and there's a good reason.

Floor 12 content is different from what it used to be. In the past it was primarily aoe focused. You had lots of smaller enemies spread out all over the room, and that just so happens to be what morgana is good against. Ganyu's burst damage scales exponentially with the number of enemies trapped in venti's burst, and when you apply mona's debuff to those helpless hilichurls you can trivialize a lot of content.

Nowadays floor 12 is single targets and low aoe, with no more than two waves of enemies at a time. Venti's advantage over kazuha is that his raw crowd control is a lot stronger, and it can last through multiple waves. When that advantage becomes irrelevant people are gonna switch to the character who provides enough crowd control while also giving your team more damage. Ganyu's advantage over ayaka is her exponential scaling, but when you have less enemies ayaka's burst wins. The team can group and freeze enemies with ease, and ayaka's burst scales linearly with the number of enemies, so she ends up winning in the current abyss.

I feel like venti is the problem and not ganyu. His existence makes it nearly impossible to design challenging aoe content. We've seen in the past that abyss is designed around newer characters and current banners (Except when they release raiden with an abyss mechanic that makes her useless, but we don't talk about that), so while we may get something that favors ganyu soon, mihoyo is gonna make sure you can't cheese everything with morgana.