Oh man, this is gonna get messy...
1. Zoro sorta blocks a combo attack from TWO Yonkos... That's a lot more impressive than anything any YC has ever done;
2. BM gets BFR heavily... Like she actually might be sent flying like DD flying from Palace to Downtown Dressrosa, for her to go into the sea like that, since Onigashima right now is on Wano land most likely, based off the Mount Fuji panel. BIG credits to the SN duo that did it.
TBH, even before this chapter, 2 Yonko vs 5 SN seemed pretty evenly matched so far, one side gains momentum at times, then shifts to the other side, like SN captain Trio went in with their strongest forms(Boundman, Punk Rotten, high level Room techniques) first, was dominating Kaido, BM had to come save the day with her strongest form(Main Homies Imbued). Then Luffy went out of G4, the SNs are weakened, while Kaido entered his strongest form(Hybrid) as well, Yonko duo started gaining upperhand, SNs took damage, Kidd was beat out of Punk Rotten, but they were mostly managing fine, Luffy recovered too.
So it was pretty much a fight that the side that goes in their strongest forms has the upper hand, against the side that doesn't, pretty even to me.
Which means, the average of these 5 SN's are prob either at the top of YC level or reaching In-Betweener caliber, if they can fight pretty much equally against 2 top tiers at 5:2 ratio, for nearly an hour...