This topic is a great discussion about the IC signposts for A Christmas Carol. The impossible signpost progression mentioned was the IC signpost order of Progress → Past → Present → Future (Jacob Marley, Ghosts of Christmas Past, Present, and Future). Assuming that this is in fact the actual order illustrated in A Christmas Carol, then the storyform would be inevitably broken because there is no storyform that can match that order. However, @mlucas mentions in the above topic this about the signpost order:
So if the MC’s personal problem is raging anxiety and getting his other half back gets rid of that anxiety (assuming I am understanding correctly), then that means that getting his other half back has to do with the MC throughline. That would therefore leave everyone wanting a better life to fall under the Overall Story Goal. This also sounds consistent with your working narrative argument, “learning to face fears leads to a better life.”