I think the Trooper should have cover. I mean, when you imagine soldiers, they often take cover. It would really improve my experience for the Trooper to take cover. Wouldnt it be awesome if you could duck behind a rock and toss a detanator into enemy forces, like in the movie Hope (towards the beginning)?
Now you might be thinking how unfair this would be for the Bounty Hunter, the Troopers counterpart ( an imperial soldier would be better, but). Maybe they could add cover for them too. It would be great if a Mercenary could dive into cover as the bullets fly at him.
All this is just an idea, but hey, not a shabby one !