Hi liam,
When we applied for partner visa in 2013, we followed partner visa booklet and provide evidences like bank statements etc. But then in 2014, I started to look into diff migration forum and realised my evidences may not be sufficient. We did not explained in detsils about our relationship in the statements. So we decided to submit more evidences in all 4 catagories along with statement from me and my partner. I believe evidences we submitted helped in the process. It is better to submit enough rather than regretting. I remembered immi staff told me that they will consider my new evidences as my file was not allocated to CO yet.