I mean, I get why the Marine's decided to abolish the whole Shichibukai system, but seriously, do they actually think that the lackluster amount they sent after Mihawk is going to cut it? They *might* have a chance if they had a couple dozen swordmasters in Vista's league, they have no f'n chance. None whatsoever. (Unless they decided to say "fuck it" and sent one of the Admiral's there.)
Of course, this is arguably the best time for them to kick the whole Government backed Pirate group to the curb, now that Big Mom AND Kaido are busy in Wano. That just leaves Blackbeard, and he's coming straight at them.