Custom Character
I'd like to see a way to create a custom character where you get to customise everything from your name, appearance, animation, weapon(s), faction(s) and abilities to your epic journey.
I'd like to see a fairly free choice of abilities, but with a cost based system (points to spend per gear level) to avoid forcing your character into a pigeonhole that may not fit your view of the character you have in mind. So whether you want to be a Jedi that doesn't use a lightsaber or a bounty hunter that does, the ultimate Hero of the Galaxy can be you!.
To make it your character's journey we should get it early and easily and your character should have to be on the team for each fight of that journey. Also the venues for the fights and the types of enemies and specific iconic characters faced should be customisable. So whether you want your origin story to start on Endor and end by facing Darth Sidious or after the death of a loved on on the Death Star to track Luke down on Dagobah and make him pay, it will be your journey.
So that you won't regret it forever you should be able to easily change the cosmetic stuff as well as respec your abilities and faction(s) later, but given the high potential power there should be a timer (that starts really short and gets longer as your gear level rises) once you create/respec before you can respec again.
I think it could lead to a nice surprise element in the arena. There could be one character you won't necessarily have any idea about going in. :)
Oh and we should get a custom ship, maybe in a later development (to keep us hanging around once the character is maxed).
Be the hero you want to be!