For any of those who pre-order in January (before 7th), the early access to the first SWTOR expansion (Rise of the Hutt Cartel) is now active. As was known, those that pre-order it by then, would have a 5 day access ahead compared to other players.
But for those, like me, who are waiting for the 14th of April, there is always new stuff to do. The update 2.0, Scum and Villainy is now up, and that will bring some changes to game mechanics, tokens consolidation, or many gear changes. However the most notorious change on this update, besides of course, the expansion itself, is the introduction of the Legacy Achievements, that besides the usual achievement hunt that it will bring, also features the ability to gain some cartel coins.
Anyways, one can read a bit more here.