I have a couple thoughts... first, I checked my email records and Drew knocked me off their waitlist last year on 3/23. No guarantee of course, but that might mean you have closure on Drew before you have to make your Toronto choice.
Second, I want to harp again on the strange nature of this application cycle. This is mostly anecdotal, but amongst my friends that are trying to get in this cycle- there are three distinct sets of people. Those with 1 acceptance seem to have 2-4 acceptances, those waitlisted seem to have 2-3 waitlists, and I just don't know anyone that only has 1 WL or 1 acceptance. In previous years, things seemed a little less rigid. I think that might mean there is actually more WL movement than previous years maybe.
I heard the same thing last year- with covid there were schools that were on their third set of waitlist options. This multi-year set of covid adjacent acceptances/applications is just so weird.