For a long time I expected BB to have shit haki. It made sense to me as well: give him three DFs, but no haki, so he doesn't become too OP. Then Oda showed during the fight with Law that BB is indeed proficient in CoA.
I think Oda will give the BBPs all the stats possible just to make the SHs even more so the underdogs than usual.
M3 with aCoC vs BBPs with just awakenings would almost be an even plane.
But all SHs, weakling trio included, vs BBPs who hoard DFs, awakenings, aCoC, and possible Omen too or other shenanigans? That's how you make an uphill battle for the EOS.
I don't think SHs vs BBPs is gonna be a Duel, it's instead gonna be about stopping a Terrorist Attack,
None of the BBPs DFs peak in 1v1 Fights, all of them can only show their True Threat if against an Army,
Van Augur can snipe you from another Island, is He only gonna shoot Usopp?
Doc Q can spread Diseases, is He only gonna target Chopper?
Catarina Devon can Shapeshift, is She only gonna try to fool Nami or whoever is Her Opponent?
Laffitte will try to use Hypnosis only against his SH Opponent?
Pizarro is a living Island, is it gonna be empty for his 1v1?
BBPs are not being prepared as Fighters who can defeat SHs in 1v1, but They are gonna be Obstacles who can Single-Handedly stop any Army,
None of them play fair, all of them love hurting other people, and they are almost all good at hiding or infiltrating,
Let's say a brigade of Giants is marching forward, and then stop because Augur keeps shooting at them from ridiculous distance, what will Zoro with his Top Tier Power do? Only Usopp can save them, and if another brigade was walking & suddenly are hit by diseases, can Zoro save them? No, it needs to be Chopper, and what if Laffitte hypnotizes them & make them fight each other or something, what can Zoro do? Nothing, they will need Brook to save them with his Music, same thing for Jinbe stopping Vasco's Arson, and Nami probably outsmarting Devon ... etc
Luffy's Opponent gonna be Kuzan first, because Luffy can save any place or group of people from being shattered after becoming Ice, thanks to his Rubber Awakening, and even Shiryu was Introduced enjoying killing others so much, yet He refuses to try & fight Magellan, so He clearly enjoys bullying more than finding a worthy duel.
Ten Titanic Captains = Ten Time Bombs to Stop, not Ten Duels to Win.
I'm pretty sure, all of them are gonna be taken down in a Single Attack once the problem they caused is Solved.