Colored groupings have always been there. It doesn't have anything to do with locations, but instead makes it so you can show/hide different parts of the map so they don't get in the way and whatnot.
There are a lot of changes since .93, some of the most notable ones are:
- Mouse look in the 3d view.
- Right click scrolls around the 2D views instead of making discrete movements.
- Keyboard customization. You can bind different keys to things instead of being stuck with the defaults.
- Vastly improved 3d rendering (much faster, supports things like fog and transparent brushes).
- Customizable colors (notice the grid color isn't bright blue and white anymore).
- Scroll wheel can be used to zoom in and out and change the grid size.
- More stable (doesn't crash as much).