At this point, just pave over all of Northern St. Johns county and have a developer Free for All.
Pertinence, they're working on it. Meanwhile plenty of land with existing streets, utilities, police/fire, local shopping centers, and other infrastructure being underutilized.
To be fair, not really. Up here everything seems to fill up almost as soon as it opens. Durbin Pavilion will be built-out by the summer, construction can't keep up with demand and half the reason the county approves new projects is to fund road projects to keep up with development in other places. The exceptions are maybe the new Ash complexes that were pretty much built as an add-on for the Atlantic Storage facilities that
are getting immediately filled up.
Unless you're actually talking about the southern part of the county, but the issue there seems to just be that people don't want to live there. The schools in the north tend to have even better reputations than the south and Jacksonville is close enough that it's only half an hour to drive, but not so close that the scary crime and poor people are in our backyards. Is this mindset stupid? Probably, but it is what it is. It doesn't help that there's this weird mindset of "well I deserve to be here, but nobody after me can."