I want a sandbox Star Wars game so badly. I imagine it would be one hell of a sandbox.
You begin by selecting your race and gender, with I imagine several choices, like Human, Twi'Lek, Wookie, Rodian, etc; choosing whether or not you are a Force Sensitive (with passive buffs available to non-Force users to balance the play field). Like in Skyrim, there are no proper classes and you instead become more proficient in skills the more you use them.
Several planets are visited over the course of the narrative (with large open areas linked together like Mass Effect that support free travel between them on each world). The combat like The Witcher 3 with primary focus being on either shooting or slicing and then on secondary abilities (i.e; the Force or Tech being used like Signs and bombs in Witcher 3).
Regardless of being a Force user or not, you're presented with alignment checkpoints (in the form of dialog, plot decisions, and your proclivity at mass murdering random innocent bystanders), basically being "Light, Grey, Dark".
And like Skyrim, you're free to just dash off as soon as you clear the tutorial and never touch the main plot at all, diving into crafting, adventuring, and joining various factions (I'm totally joining the Empire).
The reason that I refer to this mystical project as "Skyrim with Lightsabers" is because Skyrim is probably the most recent game to get all of that essentially right.
Skyrim. Just bigger. And Star Wars.
Oh yeah.