SWTOR Game Update 2.0 is live on PTS with major class changes such as new abilities, updated skill trees and much more. The list of all changes you can read in the SWTOR 2.0 patch notes PTS.
The OldRepublic Ru made a fantastic video addressing one of the most interesting changes – new class abilities. Enjoy!
SWTOR 2.0 New Level 55 Class Abilities