I think most map modders are stripping stuff out of ‘TheIsland’ and building back up their landscape as needed. I haven’t seen any mods with new landscape materials/texture yet which is the main place I’m having problems.
I’d suggest it would save time/work if there were simpler map templates available which included all the major subsystems(day/night/weather cycles,etc) and maybe also demonstrated how to successfully apply new landscape materials/textures. There have been helpful download examples by the community(thanks!), but they tend to be hit/miss as non-studio folks are working through things trial/error with learning curve.