* No more = needed to use SassScript
* $ instead of ! for variables
* Support for CSS identifiers. E.g. solid instead of "solid"
* Dashes can be used in place of underscores in variable names and sass functions.
* Defining custom functions in Sass
* Keyword arguments to mixins and maybe functions.
* Support for a new directive called @extend
that implements selector inheritance.
* Optimizing compiler
* Support for new core datatypes like List and NullI believe renaming !variable to $variable is more intuitive for most web developers.
Also I've made the mistake multiple times of forgetting to use an equal sign rather than a colon.
These weren't show stoppers but they added extra complexity to an elegant solution.
I'm excited about the new changes.
Single line declarations are a huge one.