Yes, CSE seems to be the only option if you have additional documents to substantiate your claim about work experience\education. But again, it takes about 30 days for them to acknowledge a CSE & have documents attached to your file.
It could be too late in certain cases should case officer make a decision in the meantime. Just wondering if you are in same boat. If yes, do you mind sharing your case to have a better understanding of it?
I just ordered for gcms notes. I've been on IP2( we are processing your application.....) since July27 and my AOR is May 10. I sent a message sometime in July asking to know my visa office and the status of my application and I got the response that it's being processed at Ottawa and my application is being reviewed and requires additional verification hence it will be outside processing time. So I guess when I receive my notes then I can tell what exactly is going on.