I'm going to add to what you're saying. Yes, there are pros and cons to that. It isn't an easy question.
We know that ballots can take an average of 12 days before getting back to us, but that varies greatly depending on where in the world the voter is. The data isn't the same for Cincinnati as for Asia, for example. We also know that, on average, voters wait six days before returning their ballots to us in the mail. However, those figures have to be taken with a grain of salt. They come from surveys we've done in the past.
It's likely that if voters receive a kit at the beginning of the election campaign, they'll wait until the end of the nominations, which is 21 days before the election, to return their ballots to us. As a result, the return of the ballots is delayed to some extent, at least up to day 21, based on the countdown.
That means that where voters are in the world can have an effect on the success rate of returning the ballots. That's a possibility, but there's usually enough time.
Certainly, if the Canada Elections Act made it possible to put the name of the party on the special ballot, which isn't currently the case, it would speed up the process, but there would be other disadvantages related to that. It's a public policy decision.