I think maybe a sequel could come from the aftermath of setting up the new society and maybe the resistance of the entrenched, old mentalities. It could possibly carry on for years.
Another possibility would be that a new protagonist could somehow find a back door into the system and start to manipulate it to his own means.
Yet another possibility is that this two books are just the first part of Sobel's plan...
There's lots of great potential in Suarez's universe. Even a prequel describing Sobel's rise could be interesting.
The author has weighed in on this in a Reddit AMA on July 28th, 2017:
I do plan on expanding the Daemon series, but I thought some time would need to go by for reality to catch up to the first two books. When Daemon was first published I got a lot of email along the lines of "the book is cool, but none of this will be possible for decades." I don't get those emails anymore.
In the meantime, my publisher was kind enough to indulge my other interests (e.g. autonomous robotic weapons, information inequality, genetic editing, and more).
The hiatus for Daemon, however, has given me plenty of time to ponder what might come next in that universe.