I know the pain of queuing as DPS - and it seems like you have time so you go to the bathroom or something, and then oops, you missed it. But... how often does this really happen 3 times in a day, giving you the penalty?

Take the chance, most of the time it won't happen and when you come back from the bathroom (or getting a drink/snack/etc), you'll be fine. If you do miss it, that's why there's leniency before penalties apply.

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But as for longer term "queue saving", I wouldn't support this. People would do things like queue while at work/school/etc, pause for their priority queue when they get home, and then a bunch of people doing this would, unfairly, stack up delays for people that didn't do this.