I'm pretty sure there's an interview somewhere out there that suggests that the XIII was modified because they didn't want players to "get lost." It would probably explain Lightning's comments in the forest and in the food production area; FFXIII was probably originally less linear than it ended up being. FFXIII came after FFXII, which people complained was aimless. After the FFXIII linearity complaints were probably much more vocal, I doubt we will ever go back to FFXIII like map design. FFXIII was really a continuation of FFIX and FFX's general dungeon linearity, except stretched out on one long single map as opposed to separate screens and interrupted by random encounters to make it less obvious.