I do share these expectations.
Will Gege's gave us them? I hope.
Do I need 10 chapters each? Nope.
We will see anyway. I agree 1 year isn't enough, but will Gege actually end JJK as soon as he said? I wont bet on it.
We don't need 10 chapters for each of course. But expectations are built. Especially when it comes to fighting chapters. We've spent 5 chapters iirc on Yuta vs Ryu and Uro, 5 chapters on Hakari vs Kashimo, 7 or so on Kenny vs Choso and Yuki. The most hyped fights need to be delivered properly. And this is me strictly taking into account fighting.
Gojo vs Sukuna ending in 2 chapters would be a major disappointment no matter what happens. Kenny being taken down in the same span as well.
These are the apex fights that need to be properly handled.
Heck this fight will prolly last a few chapters now. I expect Kashimo to have a few chapters as well against Sukuna, especially with his once in a lifetime CT.
If a fight deserves an entire volume it's deffo Gojo vs Sukuna.
I am not sure if Gege will end it in a year as well, but he seems to be making an effort to do so.