The Star Wars: The Old Republic site has been updated with a pair of articles outlining class changes to both the Republic Smuggler and the Imperial Agent with the arrival of the v2.0 "Scum & Villainy" patch earlier this week.
Alacrity Improvements: One of the big changes to combat systems is the way that Alacrity works. Prior to this update, Alacrity came with a tradeoff for some classes, and it was nearly useless to other classes. The faster you attacked, the more resources you would spend, and that only worked if you had channeled abilities or abilities with activation times.
Now, Alacrity will increase the activation speed of all abilities, including instants. We haven’t just shortened the global cooldown, either. When activating any ability quicker, its animation will also play quicker. This makes some attacks look and sound very cool. Furthermore, Alacrity increases resource regeneration by the same rate, helping you to recuperate resources more quickly as you spend them more quickly. Now more Alacrity is strictly a good thing.
Read more about each at the links provided above.