A previous dev has recommended the GTA 6 map really should be smaller plus much more densely packed. Having said that, as leaks have continued 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://grand-theft-auto-6-traile63152.blogdigy.com/grand-theft-auto-6-release-no-further-a-mystery-55130915