Sure. The travel issue is one very obvious example. We had B.C. saying they didn't know if they could prohibit travel across the Alberta border. They needed legal advice. They weren't sure. Meanwhile, on one side of the border, we have Banff, which is one of Canada's hot spots, and on the B.C. side, there are much lower rates.
To me, an obvious role for the federal government, which they could still do now as opposed to looking backwards and saying here's what you should have done a year ago, is to use the Emergencies Act to deal with that travel issue, as provinces have vastly different rates of COVID and that's how variants spread.