This arc isn’t over yet and already has a lot of characters and going on but, unless Oda just decided to abandon his overarching character arc, I really don’t get why Smoker (as well as Tashigi, the rest of G-5 and the children) isn’t on Egghead from a storytelling standpoint.
This would’ve been the perfect time to have Smoker finally choose the side of true justice when faced with the assassination plot against Vegapunk, as well as the old man’s message to the world. He’s joined forces with and had his views of the world and piracy challenged by the Straw Hats twice now so this being the tipping point just makes so much sense.
Of course, Smoker doesn’t dream of being a pirate or anything but, when faced with no other choice after choosing to rebel and his values, maybe he’d even join the Straw Hats in pursuit of true justice ushering in the Dawn of the World.