Gritty fits into the Star Wars universe very well, it's not pretty technology, it's a place where ships spark when they take damage and a droid with a blown motivator emits smoke.
The characters in places like Tattooine are worn and tired, most of them willing to walk the edge between good and evil just to make ends meet. I am playing a Dark Side campaign now, and even though I just lost one of my Jedi characters in an arena duel (it was for the semi-final round, he could have given up, but didn't...) it is a dark world in which they live, one of the combatants (A Klatooinan was being forced to fight, because his Hutt 'owner' had abducted his litter of pups and threatened to kill them if the fighter didn't excel... So the gritty is there, just pick up the detail to strike it home.
Take the material that's given you and add weather.... it's a great way to start making the world more real