I still don't get how to change the attribute to give Lightsaber from BRN to AGL. Which talent changes this??
You have to select the Ataru Technique from the Ataru Striker specialization, and then on the talent tree itself, there will be a box in the upper right-hand corner that will let you change the Lightsaber skill from Brawn to Agility. Same holds true for each of the LS Form specs (except Shii-Cho Knight) from Force and Destiny in regards to the Form Technique talent that allows the PC to use a Characteristic other than Brawn for the Lightsaber skill.
I wonder if as part of a future update, OggDude could revise this so that the Form Technique talents work similar to Dedication or Smooth Talker, in that when you select the talent, you get a pop-up that says something along the lines of "Pick from this list to determine which Characteristic to use with the Lightsaber skill," with the program then checking to see which of the Form Technique talents you've got and showing the appropriate list. So if a PC with Ataru Technique and Shien Technique later picks up Niman Technique, upon purchasing that third talent, the pop-up box would give you the choice of Brawn (the default), Agility (Ataru), Cunning (Shien), or Willpower (Niman).