Hey, I am very much in the same position as you. This year I applied for U of T and York's 2 year MSW, York's Post-Degree BSW and Carleton's BSW, to maximze my chances of getting into something. I thought I had a decent application and chance of getting into at least York's MSW but after checking out this forum for the past few months, I realise I am way under-qualified!
On Monday, my York Myfile account updated to show I was accepted into the Post-Degree BSW. I imagine if they invited me to the BSW they won't be accepting me into the MSW which is disappointing but completely understandable given the qualifications of everyone else here! As far as what they are looking for, I can tell you a bit about my application for the BSW. York is very much focused on anti-oppression and the like, so I tried to tailor my application to this. I focused on how I wanted to combine my undergrad degree in International Development with a social work degree, to work with Canada's immigrant and refugee population. I spoke a lot about the time I spent volunteering in Latin America post-graduation and I think my application might have been positively received as well because I focused on what I don't know, and what their program would teach me. Because I learned after my undergrad that although I know a lot, I still have a lot to learn, and York's program can help me get to where I want to go.
My advice would be to focus on getting unique volunteer and/or work experiences over the next several months so that your application will stand out from the rest!