I said before, I'll say it again, Oda just way too much plot unfinished.
Either Oda was going back later, or he decided to scrap a ton of plotlines right at the end, and while Oda does scrap minor plotlines, Nakama candidates, Pluton, and the SMILEs were pretty big deals in the story.
I just want Oda to really do it properly this time. 150 chapters just to not conclude Oden's plotline, ughhhhhhhhhhh