I look up about Sasaki word with Kyoshiro, both speak general as equal each other, probably knowing for each other for a long time.
Also Sasaki didn´t say Lord/Boss Kyoshiro well Pageone did, which show again that even between the Flying six we have a ranking based when it come to respect. Ulti and Pageone seems the youngest of the flying six and also the "weakest", then the middle rank with Black Maria,Sasaki and xDrake who seems more mature and then the strongest(I would put xDrake into the group probably though too or switch him with Sasaki) who is based on Who´sWho, the one who is closed to the calamity.
Oda making it sure and clear that the alliance first big Challenge gonna be the flying six, the Calamity didn´t even get the hype as the flying six in the last chapter. Only Queen get his shine and he just let his army do the work.
The among of hype and screentime for the flying six, Oda want to make it clear that this troup gonna be for sure a problem and the first big challenge for the alliance, they are Kaido special troup which also make him proud to the point where he want to show them to Linlin. Alongside with the Calamity who stand up as the strongest force, the flying six gonna be hard for sure too.
For the numbers, I think they represent the "Veterans" of Kaido group as we see one of them fighting and catching back then Inu and Neko, they beeing longer in Kaido crew and holding up the balance between the Yonkous for a while, well the flyers beeing most like the new and higher group who join Kaido crew(probably make in the last 5years?). I mean even Jack is know for Big mom but she didn´t know the flyers?
Because that Kaido want to show them to Linlin, they represent the inbetweener of YC lvl and Vet lvl:
Yonkou Commander
>
Flying Six
>
Veterans
Which means I can see them posing overall the threat of someone as Neko/Inu/Snack/Judge lvl characters.
Because of the hype for the group who give by Oda in the last chapters, I doubt that Ulti and Pageone get destroyed in the next chapter.
We speak about Oda who let Luffy and Zoro looks bad against one Supernova, Apoo. I wouldn´t be surprise if he do would the same again...