The only real issue is with Amazon Lily getting taken out and the route Oda wants to take and that route is his, and his alone. However the issue with leadership can be easily solved. She handed leadership over to her sisters while she was away. If she 'abandons' AL the sisters will just take up that mantle or someone else more determined to rule/help the people of Amazon Lily will take up the place instead.
An issue with a dream can be rectified right before joining or in the climax of another arc. Most the people who claim Hancock is going to join (including me) don't think she is going to immediately join until she becomes the centerpiece or at least one of the centerpieces in another arc where she will cement herself. None of the strawhats simply joined, they all had to have something that made it clear they were with the crew through the end of it. Both Hancock and Jimbei do not have such a trait but there is evidence that one can easily be made in the up coming fishman island arc. Both their pasts have turning points with that place and its people.
true and you bring up valid points almost all the strawhats although except Robin had an arc where they were first introduced ussually their dream was introduced and the crew had a position to fill unless hancock has some secret talent oda has yet to reveal she can't fufill anything. Although the same thing can be said for Iva and Jinbei. I personally feel that these charecters should just stay as friends of the crew and not join because of these reasons because each has duties most likely to fufill(Protecting fishman island if Whitebeard dies, Ruling Amazon Lily, helping the revolution and possibly leading okama kingdom (not sure what the official name.))
