A previous dev has recommended the GTA six map should be smaller and even more densely packed. On the other hand, as leaks have ongoing to trickle out of Rockstar, modders have recreated the GTA 6 map in GTA 5's engine which gives a way of its large scale. https://jasperspoli.blogscribble.com/36365808/5-essential-elements-for-grand-theft-auto-6-ps5