I am curious to know how it would work for those of us with no agents to speak of. Mostly I am mostly talking about myself since I probably won't have an agent for a long time coming.

They are usually specifically written to be capable of dealing with the problems inherent to traveling between worlds repairing the injuries to reality, whether that's simply in their personality or whether they're part of an advanced species or have access to magic or some such, while the Boarders, being normal humans who have no experience hunting down and killing super-powerful creatures, blowing up planets, or untangling timelines, would be considerable less able to deal with the Agents' problems, especially if it's a sudden switch that leaves them replaced with the characters they write. I'm not saying that everyone would be absolutely incompetent, and in fact there may be a few of us who could do their jobs decently or even well if they were lucky enough to land in positions where they could best use their existing skills, but there would be many that wouldn't or couldn't be acclimated to the job, and our performance as plot protectors would suffer for it.

Plus, keep in mind that PPC Boarders who have any Agents tend to make at least two or three of them. If the writers and Agents swap places, not only would we be less capable of dealing with the job, but the number of PPC employees would drop by at least half. Considering that the PPC is already constantly understaffed, that would definitely not be a good thing, especially since practically nobody writes for Infrastructure or Security any more. SeaTurtle would be all alone in the Intel offices, and Huinesoron would be the only person working on Building Maintenance while also running double-duty with DOGA. And who would be the Department of External Security? All of its employees seen so far are either free-to-use or haven't yet been defined, but without them, the nebulous threats on HQ that the DES Agents spend so much time fighting that they are barely even shown would have full freedom in HQ, and all that could stop them would be a small contingent of Internet people who are still getting a handle on their new duties.

I realize that this is a very cynical interpretation. For a bit of levity, feel free to imagine the flip side of this, with the Agents being sent to Earth and having to live "normal" lives. Think of all of the elves that would suddenly need to learn how to drive cars to keep from getting fired from their new jobs, or the numerous anthropomorphic or otherwise humanized animals walking around the grocery store buying food while deliberately not making eye contact with the dozens of people who are staring at the strange creature in their midst and wondering if they should call security.