Gaban said he not even feel that sort haki on GV.
We know that Imu was on GV .
What this tell us that In person Imu haki feel differnt .
Could also mean his haki just on differnt level than everyone else that was even on GV .
Then again if people want to say they gaban know the level of shanks haki it's easy to say the giants should also know level of shanks haki.
They were with him when he OHKO kid and kill before they go and rescues the SH.
Which they compare to joyboy so go with what ever you want time will tell .
Feel like from now on, Oda stopped caring about powerscale overall. He will make anyone above Roger/WB tier without any second thought, capable to even cut/destroy earth. At first he tried his best to put a limit in strength but now everyone can solo a country lol.
Mythical Zoans (powers with no limits) gonna pop like mushroom everywhere. For example Killingham's power is already so broken, yeah in his hands, it looks okayish but still ienough to solo Elbaf if Loki isn't there ...
For Sanji, Oda will just says "modified body" so 0 limit for his upcoming PUs.
For Zoro, Oda popped from nowhere a reaper even tho he forgot about it later lol.
For Luffy, well ... he has his time limit but the power of his gear 5 itself has no limits.
I mean most of the older character had DF that could just destroy countries .
The issues is people like like roger we not see them with big Aoe attack.
Kaido can lift up islands or just bolo them to death , BM got so many option to destroy country and of course WB.
Both new and old admrial got mass AoE attacks .
It just roger we not see with a big AoE attack hell Grap got attack that we see could destroy a country