The first stanza of "So Long", which becomes the chorus of "All Coiled Down" as sung, has the third line

    Another ship for me, an' for her another crew --

In the song as usually sung, "me" has become "us". It seems to me that Ms. Smith has logic on her side. If the whole crew were going to another ship, there would be no point in saying goodbye; it has to be either as written, or "Other ships for us".

However, it turns out to be rather odd of me (perhaps even insane) to try to imagine the situation described by a song.