Coming to this as someone who has enjoyed the whole thing, regardless of expectations... making the fifth Symphony either its own thing or the start of something new sounds like a good plan.

However, I'm with whoever it was that said you should probably wait until the Diqiu suite culminates. Until you (and by extension, we) know where it's really going, making a decision that will drastically affect the entire website's structure seems... somewhat foolhardy. On the same note, though... might not be a bad idea to start looking into ways to make the restructuring painless as possible. Maybe get someone started on the new graphics and a bit of the coding.