My plan would have been simple:
1) Gather a few groups of the best experts to size up the threat and recommend a solution.
2) Start the response quickly based on what you know - don't wait for all the details, facts and figures.
- Scientists to handle the medical threat
- Economists to handle the economic threat
- Influencers and great communicators to get the message out
Make it well known that the course of action will change as we better understand the situation, bravely make changes when they are necessary (don't worry about political fallout).
3) Better engage the public into the fight, let their results drive the responses to openings and lockdowns. Make it clear that winning has benefits (openings) and losing has consequences (lockdowns). I'd also do that at the community level -- there were portions of Vaughan and Peel that should have had a 20m electrified fences erected around them.
Hindsight is always 20/20 and it is clear right now that public messaging has been a problem area. "We need to do X. We know this is going to be hard on some people and we also know that this is not going to be 100% effective, but we need to do what we can, and we need to do it now. This advice may change when we have more knowledge. This vaccine is designed for what we have now ... you can expect the virus to change over time, and you can expect that you're going to need booster shots or supplementary shots to address these changes in the coming months and possibly years."
I don't think anyone expected how significant the conspiracy theories and deniers on social media were going to be.