I still think the Ultimate Edition angle is the real story here. Rockstar priced it just under the clean wallet number, so people who want the extra vehicles and cosmetics feel like they are getting a tiny win even when they are mostly just paying upfront for the premium tier. That kind of framing matters a lot for RP players who care about starting out with the nicer stuff.
If they pull the Everglades off properly, that could be the best vehicle playground in the whole game. Boats, airboats, off-road stuff, hidden trails – there is a lot they can do there without needing to cram in another city block.