Jalathas

Hey! So this mod (and the associated ones) looks really cool, but I'm not sure I'd want to redo only certain environments. Are the overhauled zones different enough that the unaltered ones would look off in comparison? If so, (or even if not really) how long do you anticipate the full game taking? I know it's a huge undertaking so feel free to say you have no idea, that's totally fair.