A nice addition for this mod would be to not only allow particular locations from certain chapter, but also to LOSE access to those locations when entering to another chapter. For example, you can enter orc mine from chapter 3, but when you go to chapter 4 you lose access permanently. That would give the player a reason to not rush into chapter 4 for OP gear when that location will become super easy, but force him to do the location with chapter 3 gear when its challenging.