My understanding is that since the spouse was added after AOR, the minimum required documents are medicals and PCCs for any country the spouse has lived in for more than six months in the last 10 years. I have not researched this thoroughly, but I believe that an ECA and IELTS for a spouse are technically not required; people use them to score as high as they can for an ITA. In this case, since the spouse was added after AOR and the primary candidate's CRS has been "locked in", producing an ECA and IELTS scores (no matter how good) for the spouse would not really expedite or enhance the application.
So what additional docs u had to submit for spouse ?