I fully agree we have to send enough documents the first time around but I would be cautious sending any additional documents without being requested. The general consent is its not recommended unless they requested since it raises a flag - I had visited my wife twice already this year and wanted to send additional photos, tickets etc but senior members suggested not to.
"remember what you may consider to be a "red flag" or an "issue" may very well not even be a concern for the visa officer reading the application. there's no point in offering up unnecessary information that can cause the officer to wonder why you are sending more proof when it wasn't even request."
Here is my thread:
http://www.canadavisa.com/canada-immigration-discussion-board/submitting-updated-relationship-proof-t274340.0.html;msg4117391#msg4117391
8-9 months see to be the sweet spot on applicants getting any update on the file of course people have to wait a bit longer, since you are there now I wouldnt be worried. You can order the notes and do a MP inquiry.