SpyfyAddress changes can be a hassle. I would wait, but others would say apply asap. There is no clear cut, factual answer here.
As per my understanding i will submit my application to Sydney office and they will perform some checks and then later on depending on processing time. The application will be transferred to a local office so i think as long as i will update new address before the transfer to local office i will be fine.
Thanks for ur reply.