More dramatism ingame. Make some characters in party die along the way,some new come in their place,something like that....
Make places,where PC should decide,whether do this or that,and thus loosing one char or another.... but plz,no option "I save them both!".... make more difficult decitions ingame. (f. ex " I can save either visas or handmaiden,so I have to choose...." or "some1 should stay,to activate somekind of detonator or smth,to destroy <insert name here> ,fate of galaxy depends on it,so you have to choose 1 of 3 chars with highest influence in party,as volounteer (highest influence,coz low inf chars wont egree to do such thing for you), to stay behind and activate bloody thing,sacrifising (I think it spelled incorrect) his life for greater good" ) I think that would be cool,especially when there lifes of your most beloved characters at stake.... heck,I guess some ppl may follow the path of the Drunk Side for some days (or weeks?) ,after loosing such NPC
Of course more persoonalities to NPCs who accompany you....
No random item drop,coz it complete bulls**t when you find 3 and more same items,that supposed to be unique.
Make 2 semiseparate storylines,so player can choose at start to play either Revans storyline,or Exiles. Make them cross at some points of the game. Would be cool to achive same (hmmm... or not?) goal,from different points of viev.