I wish that TS4 at least had a TS2 style world creator, where you pick the base map, climate, terrain type, sky box, road types, and background elements/theming (the options for which depend on what packs you have installed, so that you can mix and match maps and elements from your favorite pre-made worlds), and you get an empty world to build and populate as you see fit. They could even set it up so that collectables and secret areas are procedurally generated based on your world's climate and terrain settings. That would be nice...