Ok, so myself and anyone else not sure what attributes do what I have found some information. I still am not sure what the difference between normal and Kinetic damage is though.
Primary Stats
All primary stats give 1% crit for every 140 (at level 50)
Aim gives 0.2 ranged damage
Strength gives 0.2 melee damage
Cunning gives 0.2 tech damage
Will power gives 0.2 force damage
Secondary Stats
Presence – boots companion health, damage and healing
Power – adds melee, force and tech damage
Force/Tech Power – Found on weapons, works like Power but does not provide melee/ranged damage
Accuracy – Gives +hit and gives armor/spell pen over 100%
Crit – gives melee, force and tech crit
Surge – increased critical damage
Armor – reduces physical and kinetic damage (all Tech and Force powers unless listed otherwise are Kinetic)
Defense – increases Parry/Deflect (deflect is just ranged parry)
Shield – increases chance to be shielded on attack
Absorption – increases the % of damage shaved off shielded attacks
Alacrity – Cast/channel Haste
Expertise – PvP stat. Increases damage and healing done, reduces damage taken.