I wonder who Akainu gonna send to Wano nw, after Drake reported BM n Kaidou made an alliance. They are also baiting Dragon to come out and Abolishing Schibukai system might also need an Admiral to go down to Mihawk. The country Heads also needs to be escorted safely. BB also is trying to outrun Marines in something.
So it's ckear Marines forces are very distributed n thin to act on all the events together. My guess is only Battleshios are going after Schibukai. Fuji n Ryo stay in Mariejois and Kizaru arrives in Wano. And BB also is heading to Wano to gain Kaidou df, or is gonna visit Mariejois.
One more question, why was Akainh unsure of Wano samurai strength when their spy Drake was already in Wano?