Z did it when AOS came out, or he lead the whole process. I didn't help with that. It was just me and Z testing for a while so we were doing stuff without overlap. Thank god DY came along. We haven't changed that section much since.
My advice would be to just start over with AOS as the base and build the whole section from that. I'll do any necessary patching. It's pretty easy after doing it a thousand times.
If I could make a suggestion Immersive Sounds Compendium could make a solid base.