Supreme apologies in advance if I'm overstepping bounds, but what about using the unfinished portion of Symphony 3 to lay in whatever new plotlines you'd need to put the narrative right? And possibly pull the Diqiu stuff out of line and make it its own subsection? It's very good material, but it doesn't really seem to directly be part of Symphony 5. Either way, even if you don't "fix" anything, it's still damn good writing.

"This is probably a stupid question, but . . ."