A former dev has advised the GTA six map need to be smaller and even 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 sense of its large scale. https://grandtheftauto6releasedat98204.ssnblog.com/35236037/5-essential-elements-for-grand-theft-auto-6-ps5