Ulti speed is nothing compared to hakuba which Robin stopped easily. Robin isn't weak. Also i think you forget Nami HAS ZEUS. Also Luffy only needed G4 to break out of her grip quickly. G4 would have OneShot her just like Yamato did.
She had the power of zeus against Galetta too, didn't help her to take out her. Robin post ts was a full disappointed, nothing impressiv expect the Hakuba shit which even someone as Rebecca could dodge.
Should I remember you what happen the last time when Rest strawhats face of Vet lvl character? When Carrot/Nami/Chopper get casually negged by them? When Pero neg diff both Brook and Chopper. When Franky and Usopp literally beeing left shocked because of seeing Pageone strenght?
The rest strawhats having nothing to point out that they could match xDrake lvl characters who could even force Luffy into G4, who could even hurt Luffy while using CoA. And neither it isn't clear if Pageone and Ulti are down, they could easily stand up in the next chapter.
Sry but if we compare feats/scaling and portrayal, the mid/low strawhats should fit weaker opponets since facing the Flyers would be similar as suicide. Without any help of strong character I don't see any strawhat face 1on1 against a flyer, sry but Oda simple fail to show and give a proper portrayal for the mid/low strawhats.