I think people are going to be in for majorly rude awakenings with scalings as this series approaches its endgame. In a way this can be seen as a good and bad thing because the series has, unironically, scaled inconsistently and consistently between major characters.
Some bounty/threat scalings like for a Crocodile are ridiculous and I hate it personally, but for Mihawk this absolutely makes sense. A 3.59 billion bounty, higher than CGs leader, is essentially the high solo, non-captain bounty we have in the series. Arguably all captain/leaders have inflated bounties due to their threat to the WG. Kaido's was super high given his tendency to reap havoc wherever he went, and Whitebeard was considered the strongest pirate alive and closest to One Piece.
The same idea can be tossed around Admirals and Akainu. They are, by CG, scaled at 3 billion, a bounty much higher for subordinates under Yonko (who average around 1 billion). But Akainu runs the entire military, so his 5 billion bounty by them makes complete sense. It does not mean his strength is scaled that much higher, it just means hes that much more of a threat to piracy in accordance to CG, even if he is stronger than other Admirals.
And yet, this sort of lends credence to what is probably happening to Blackbeard and Shanks' crews. Blackbeard has Kuzan, who, being an equivalent to an Admiral, means his bounty could hover in the 3 billion range. Shiryu and presumably Laffite might as well too, we know Oda will scale some of them to surpass Admirals. Same with Shanks. Could Beckman be closer to 3 billion than we think? Roo? Yasopp? The crew is considered smaller yet more impregnable when compared to other crews.
Shanks has a twin brother, who unironically might be similar in strength to him. Given Shamrock's ranking within the God Knights (their Captain), it suggests that Shamrock himself may scale above Admirals at least, given Shanks' prowess.
No fundamentally who knows what this suggests for the Gorosei and Imu, barring their immortality. Nasujuro seems extremely capable as a swordman, pulling a feat only Mihawk has similarly done without direct powers like Law did (i.e. Slicing an island). Warcury's armament was so hard it hurt Luffy's own armament.
The point Im truing to make is, fundamentally, leaders of factions are scaled differently than "subordinates". Mihawk himself is in a very different spot because hes the only person in this story with that role, which is why I can absolutely believe he's the WS and combatively, scales over other swordmen in history (including Shamrock, Shanks, Garling, Roger, Xebec, etc). That SAID, this does NOT play nice with non-swordsmen, aka opponents generally well reserved for Luffy, i.e. leaders like Akainu, Blackbeard and Imu. We'll never know were Mihawk falls on that metric because even if Zoro defeats any of their subordinates, they are not equivalent to these characters.
Idk, thats my 2 cents on this. Mihawk is absolutely going to be the hardest fight Zoro has, and with it, yeah, it would suggest he's above characters like Shanks, but given that Shanks might lose to Blackbeard for example, its hard to say beyond that for non-swordsmen. And to me this makes sense, Zoro is not Luffy's equivalent. He's his subordinate, and not the MC of the story, no matter how much people cry about it
I have a lot more i could say about it, but frankly Im sure this comment is going to get hate from all sides of the table lol so whats the point.