Personally I like the fact that they have removed the color restrictions on the Crystals.
Now as for the legacy I am also a fan of that as well.
My Jedi whom I RP was at one time early in his life apprenticed to a Sith Lord, however due to one event he witnessed he realized he had been deceived and escaped the Sith Lord.
Now with the Legacy I can RP my character using either Force Choke or Force Lighting as I have a Sith Inquisitor who plays the role of his Master.
I am a Fan and I like the Change.