My Ideas/Recommendations:
Gang dens, specific places that would allow the gangs to base and war on each-other without having firefights on the main drag. Would also give CP a good place to patrol Underground area, could be made into any assortment of illegal/sketchy buildings, a place for black market deals to take place and rebellions to be undertaken Larger/more spacious PD & Flushed out jail More alleyways and spots for hobos to build, let those creative hobos showcase their buildings! Fancy and sketchy apartment buildings Security/camera room in PD, has an assortment of cameras fixed in place around the main areas of the map that can be monitored at the PD Rotating/cycling NPC locations, E.G. the extreme gambler spawns at the different places around the map on occasion. (Would be cool if it responded to player/job count, wherein a lot of active CPs would make the gambler spawn in the hidden sketchy places, and a low CP count means he spawns out in the open. More, larger stores. Multiple roads leading in and out of every area, No more areas that only have one road leading in and out. Spread out NPC spawns and have non-RP related NPCs (Custom class creator/editor, etc) only spawning in the player spawn. Try to make some, not all areas somewhat easily controlled by a king or party