I'm sure this has been discussed at some point but I could not find anything. Why does each race not have a specific ability that only they are capable of doing? I know they have specific stats, but why don't the Miraluka have a special force sight ability, or a a special dark side channeling ability in the sith pureblood?

I can't find the hadra's defeat mission...do I just have to wander into the area?

From a purely roleplaying perspective any neutral, or light Jedi for that matter, should not be concerned with the acquisition of things. Of course if you aren't a Jedi then things can get tricky. Maybe the bonus doesn't come in the form of gear or relics but more interesting story and dialogue options, as someone who considers all the options available you might be finding different opportunities? I don't know, I haven't gotten to relics yet so I am not sure how that really works. I just don't think you are being punished for playing the game you want to play, its just how the game is.