I would like to see some more unique abilities for species and better balance. The majority of species gain extra talents or skills, which in an XP driven game, essentially amounts to additional XP. This is not a problem except when some species have special abilities that cannot be bought with XP.
Wookies- Rage, +4 WT for -2 ST
Transdoshan- Claws, Regeneration, +2 WT for -2 ST
Not that these abilities are overwhelming (especially since they are melee) but they do, technically speaking, make Wookies and Transdoshan mechanically more powerful.
I think the fix would simply be to give each species a unique species talent or two. I would tend towards active talents. For instance, instead of giving Bothans the convincing demeanor talent, why not give them a talent that gives them a once per encounter or day re-roll of a deceit or skullduggery roll or allow them to add an additional free advantage to a successful deceit or skullduggery check?